If a, b and c are positive numbers such that (a2 + b2) ∶ (b2 + c2) ∶ (c2 + a2) = 34 ∶ 61 ∶ 45, then

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If a, b and c are positive numbers such that (a2 + b2) ∶ (b2 + c2) ∶ (c2 + a2) = 34 ∶ 61 ∶ 45, then b-a:c-b:c-a ?

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