If 7, 14.2, 21.7, and x are in proportion, what is the value of x?
44.02
For four quantities in proportion a : b :: c : d, the fourth proportional d = (b x c) / a.
Here, x = (14.2 x 21.7) / 7 = 308.14 / 7 = 44.02.
Hence, this is the correct answer.
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