If 7 and 189 are the first and fourth terms of a geometric progression respectively. Find the sum of the first three terms of the progression.

If 7 and 189 are the first and fourth terms of a geometric progression respectively. Find the sum of the first three terms of the progression..

If 7 and 189 are the first and fourth terms of a geometric progression respectively. Find the sum of the first three terms of the progression.

If 7 and 189 are the first and fourth terms of a geometric progression respectively. Find the sum of the first three terms of the progression.

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