3. Find the value of x for which the following ratios are in proportion with proper equation:
(a) 3:5 :: X: 25
(6) 7: 14 :: X : 30
(c) 75: x :: 12 : 72
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Answer:
(a) 3 : 5 : : X : 25
» 3/5 = X/25
» X = 15
(b) 7 : 14 : : X : 30
» 7/14 = X/30
» X = 15
(c) 75 : X : : 12 : 72
» 75/X = 12/72
» 75/X = 1/6
» X = 450
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