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# What Is meant by 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 $\frac{a}{b}$ = $\frac{c}{d}$ means we get ad = bc

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