Can you please teach me this step by step:- 1. Find the value of x. 1) 30,108,42,x 2)80,30,x,240
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Step-by-step explanation:
1) 30:108::42:x
product of means= product of extremes
108*42=30*x
4536=30x
4536/30=x
151.2=x
therefore, fourth proportional is 151.2.
2) 80:30::x:240
product of means= product of extremes
30*x=80*240
30x=19200
x=19200/30
x=640
therefore,third proportional is 640.
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