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Question
Find the value of x so that the given four numbers are in proportion:
2, x, 10 and 25
Sum
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Solution
2 : x : 10 : 25
⇒ x × 10 = 2 × 25
⇒ x = `(2xx25)/10=25/5` = 5.
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Proportion as Equality of Two Ratios
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