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If a : b = b : c, then ratio a 4 : b 4 is equal to

ac : b2
a2 : c2
c2 : a2
b2 : ac

Correct Answer: a2 : c2

Explanation:

Given that a /b = b/c
⇒ b² = ac
∴ a⁴ : b⁴ = a⁴ : a² c² = a² : c²

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