The product of 3^rd term and 8^th terms of a G.P. is 243. If its 4^th term is 3, find its 7^th term.

Find the geometric progression with fourth term = 54 and seventh term = 1458.

The fourth term, the seventh term and the last term of a geometric progression are 10, 80 and 2560 respectively. Find its first term, common ratio and number of terms.

If the fourth and ninth terms of a G.P. are 54 and 13122 respectively, find the G.P. Also, find its general term.