Question

FIND THE FOURTH PROPORTIONAL OF 4 h.r 40 min, 1 h.r 10 min, 16 h.r

Answer 1

P.M = Product of Means

P.E = Product of Extremes

Answer 2

Answer:

Let the fourth proportion be x

all digit change in min

Now, first 4hr 40min =280min

second 1hr 10min = 70min

Third 16 hr = 960min

A/Q

280:70::960:x

280/70 = 960/x (Cross multiple)

280x = 19600

x = 19600/280

x = 70

Hence, The Fourth proportion is x = 70 =1hr 10min

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