What are middle terms and extreme terms in 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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