Find $x$ if 4.8, 6.0, $x$ and 8.5 are in proportion.

6.8

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8.6

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8.5

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5.8

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Solution

The correct option is A 6.8
In, $4.8 : 6 :: x : 8.5$ , product of extremes $=$ product of means
$4.8 \times 8.5 = 6 \times x$
$x = 6.8$

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