What is proportion?

Proportion:

• A proportion is simply a statement that two ratios are equal.
• It can be written in two ways: as two equal fractions $\frac{a}{b}$ = $\frac{c}{d}$; or using a colon, $a:b = c:d$. 'a' and 'd' are known as extremes and 'b' and 'c' are known as means.
• For example, $3:2 = 6:4$

Proportion Rule: Product of extremes = Product of means. 

If $\frac{a}{b}$ = $\frac{c}{d}$ then $ad = bc$.

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Updated on: 10-Oct-2022

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