The ratio can be defined as the relationship between two quantities such as a:b, where b is not equal to 0. The two numbers in a ratio can only be compared when they have the same unit. Ratios are used to compare two things. The ratio is denoted by the sign ‘:’. The ratio can be represented as follows.
For Example, The ratio of 4 to 8 is represented as 4:8 = 1:2. And the statement is said to be in proportion.
Proportion is an equation that defines that the two given ratios are equivalent to each other. In proportion, if two sets of given numbers are increasing or decreasing in the same ratio, then the ratios are said to be directly proportional to each other. There are 3 types of Proportion i.e.
Example1: Find the fourth proportion to the numbers 4, 10, and 12.
Sol: Fourth Proportion
=(12×10)/4
= 30
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Overview: Ratio & Proportion
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1. What is a ratio? | ![]() |
2. How is a ratio expressed? | ![]() |
3. What is a proportion? | ![]() |
4. How do you solve a proportion? | ![]() |
5. How are ratios and proportions used in real-life situations? | ![]() |