The fourth proportional to 2a, a2, cis
(a) ac/2
(b) ac
(c) 2/ac
d) none of these
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Answer: 2/ac
good luck for exam
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Step-by-step explanation:
fourth proportion will be x
2a : a²: : c : x
2a/a² = c/x
2ax = a²c
x=a²c/2a
x=ac/2
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