###
**Solve Ratio and Proportion Problems using Ratio and Proportion formulas for IBPS PO and SSC CGL Exams**

Ratios and Proportions is an important concept from the point of view of IBPS PO and SSC CGL Exams. Ratio and Proportion Formulas are used to solve Time and Work, Time and Distance, Averages etc. The concept of Ratio and Proportion speeds up problem-solving in competitive exams.

In this post, we will discuss the concept of Ratio and Proportion and will solve questions using Ratio and Proportion Formulas.

###

**What is a Ratio?**

**The ratio**is a comparison of two like terms in its simplest form.

For example, we can compare the height of Ram and Shyam, We can compare the weight of Ram and Shyam, but we can't compare the height of Ram to the weight of Shyam.

A Ratio is denoted as a:b or a/b where a is the antecedent and b is the consequent.

The two dots in the horizontal line are a colon which means "

**is to**."
Suppose a is 40 kg and b is 60 kg then the ratio of a and b will be written as 40:60

As the ratio is the comparison of two terms in its simplest form.

We can denote 40:60 = 2:3

**Question:**A company "A" sells a 53cm model T.V. at the price of Rs.7000 whereas another company "B" sells the same model at a price of Rs.16,800. What is the ratio of their respective prices?

**Solution:**

**Step 1:**

As we need to compare the prices of the two companies we take the ratio of their selling prices

A : B where A = 7000 ; B = 16800

**Step 2:**

Writing A and B as a ratio-

7000: 16800

**Step 3:**

A ratio is the comparison of two like terms in its simplest form we simplify,

7000: 16800

5: 12

Therefore, the ratio of the prices of the Company A and Company B is 5: 12.

Don't waste your time in writing the steps, directly substitute the values in the formulas and simplify the ratios.

Don't waste your time in writing the steps, directly substitute the values in the formulas and simplify the ratios.

###

**What is a Proportion?**

**Proportion**is an equality between two ratios.

i.e. a: b :: c : d

Where a, b, c, and d are said to be in proportion.

a, b, c and d are referred to as first, second, third and fourth proportional respectively.

a, b, c and d are referred to as first, second, third and fourth proportional respectively.

a and d are called

**Extreme Proportion**and b and c are called**Mean Proportion.**

As we know a: b can be written as a/b

we can write a/b = c/d

As the terms are equal we cross multiply,

ax d = b x c

The product of extremes should be equal to the product of means.

**Module 1: Solving Basic Questions using Ratio and Proportion Formulas**

**Example:**

**Question:**In an entrance test, the ratio of appeared to successful students was 21: 11. Find the number of successful students 1176 students appeared in the test.

**Solution:**

**Step 1:**

Appeared: Successful

21: 11

**Step 2:**

As we need to find the number of successful students, we need to cross multiply the number of appeared students with the ratio of successful students and the unknown number of successful students, with the ratio of appeared students to find the number of successful students.

By cross multiplication we get,
(1176 x 11) / 21

= 616

Therefore, the number of successful students is 616.

**Example:**

**Question:**The ratio of boys and girls studying in a school is 17:18. If the boys are 150 less than the girls, what is the total number of girls?

**Solution:**

**Step 1:**

The ratio of boys to girls is

17:18

**Step 2:**

We know that the boys are 1 unit less in ratio to girls and that 1 unit is given as 150.

So, 1 part = 150 students.

**Step 3:**

The number of girls studying in school-

= 18 (as it is the ratio of girls) x 150

= 2700

Therefore, There are 1800 girl students in the school.

### Module 2: An Example of Distribution of Amount Among the given People by using the Ratio and Proportion Formulas

**Question:**A profit of Rs.8000 is to be distributed among A, B and C in the ratio 5:2:3 respectively. What is the difference between the shares of A and B?

**Regular Method:**

**Solution:**

**Step 1:**

Total amount = 8000

Ratio = 5 : 2 : 3

**Step 2:**

A = 5/10 (By converting ratios into fractions)

B = 2/10 (By converting ratios into fractions)

C = 3/10 (By converting ratios into fractions)

**Step 3:**

A = 5/10 x 8000 = 4000

B = 2/10 x 1600 = 1600

**Step 4:**

A - B = 4000 - 1600 = 2400

Therefore, the difference between A and B is 2400

**Smart Method:**

**Solution:**

**Step 1:**

As we know the total addition of ratio is equal to 8000

i.e. 10 parts = 8000

1 part = 800

**Step 2:**

The difference between A and B = 5 - 2 = 3 parts.

**Step 3:**

3 parts x 800

= 2400

Therefore, the difference between A and B is 2400.

Stay tuned for our next post and don't forget to write in the comment section on how this post helped you to solve ratio and proportion questions with ease.

## 0 comments:

## Post a Comment