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Question
Find the fourth proportion to the following:
0.7, 4.9 and 1.6
Solution
Let x be the fourth prcportion .
0.7 : 4.9 :: 1.6 : x
⇒ 0.7 x X = 4.9 x 1.6
⇒ x = `(4.9 xx 1.6)/0.7`
⇒ x = 11.2
The fourth proportion is 11.2
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