Find the value of $x$ so that the given numbers are in proportion

$x : 5 :: 15 : 25$

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Solution

The correct option is B
3

When the numbers are in proportion , we have product of means = product of extremes

In the given numbers $x : 5 :: 15 : 25$

$∴$ $5 \times 15$ = $x \times 25$
$75 = 25 x$
$x = 3$

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