If 1.2, 1.8, 2.7 and x are in proportion, find the value of x.
4.05
If a, b, c, d are in proportion, then a × d = b × c.
Here a = 1.2, b = 1.8, c = 2.7 and d = x.
1.2 × x = 1.8 × 2.7
1.2x = 4.86
x = 4.86 / 1.2 = 4.05.
Hence, the correct answer is 4.05.
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