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2015-06-14T14:38:59+05:30

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Let the third ratio be x.
then,
8:9::x:25
multiplication of extreme value = multiplication of middle value
8*25 = 9x
x =  200/9
x = 22.22
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2015-06-14T14:59:09+05:30

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Let the missing number be x

8:9::x:25\\ \\ \Rightarrow  \frac{8}{9} = \frac{x}{25} \\ \\ \Rightarrow \frac{x}{25} = \frac{8}{9}\\ \\ \Rightarrow x=\frac{8}{9} \times 25 \\ \\ \Rightarrow x=\frac{200}{9}\\ \\ So\ the\ missing\ number\ is\ \frac{200}{9}.
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