If a:b = c:d then a and d are called
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If a : b : : c : d, then d is called the fourth proportional of a, b, c. Also, ... Also, b is called the mean proportional between a and C. • In general if a, b, c are in continued proportion then b² = ac or b = √ac.
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8
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If a : b : : c : d, then d is called the fourth proportional of a, b, c. Also, ... Also, b is called the mean proportional between a and C. • In general if a, b, c are in continued proportion then b² = ac or b = √ac.
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