Question

find thr forth proportion of....​

Answer 1

Answer:

let

The fourth proportion be X

1/3 : 2/5 = 8.4 : x

1/3 / 2/5 = 8.4 / x

1/3 / 1/5 = 8.4 / x

5/6 = 8.4 / x

5x = 6 × 8.4

5x = 50.4

x = 50. 4/5

x = 10.68

so, the fourth proportion of 1/3, 2/5 , and 8.4 is 10.68.

Step-by-step explanation:

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