Find the third proportion to 2.4 kg, 9.6 kg

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27 Aug 2021 Proportion

Find the third proportion to 2.4 kg, 9.6 kg

OPtion

1) 36.6
2) 36.8
3) 36.4
4) 38.9
5) 38.6
6) 38.4
7) 37.5
8) 40.2
9) 41
10) None of the above

Solution

Let the third proportion to 2.4 kg, 9.6 kg be x kg.
Then 2.4 kg, 9.6 kg and x kg are in continued proportion since b2 = ac
So, 2.4/9.6 = 9.6/x or, x = (9.6 × 9.6)/2.4 = 38.4

Correct Option: 6 Best Solution (6)