The fourth proportional of 5, 6 and 7 correct to two places of decimal is 8.40

True

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False

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Solution

The correct option is A True
In $a : b :: c : d; d$ is the fourth proportional.
For, $5 : 6 :: 7 : d$ , product of extremes $=$ product of means
$5 \times d = 6 \times 7$
$d = \frac{42}{5} = 8.40$

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Similar questions

6 \frac{7}{8}

Find the square root of each of the following correct to two decimal places :

(i) $3 \frac{4}{5}$ (ii) $6 \frac{7}{8}$

Find the square root of :

(i) 245 correct to two places of decimal.

(ii) 496 correct to three places of decimal.

(iii) 82.6 correct to two places of decimal.

(iv) 0.065 correct to three places of decimal.

(v) 5.2005 correct to two places of decimal.

(vi) 0.602 correct to two places of decimal.

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