SOLUTION: Dear Tutor Could you please help me with this question and can you please show me the solution.If the first 3 items of a geometric progression are a − 1, a + 3, and 3a + 1 f

Algebra ->  Sequences-and-series -> SOLUTION: Dear Tutor Could you please help me with this question and can you please show me the solution.If the first 3 items of a geometric progression are a − 1, a + 3, and 3a + 1 f      Log On


   

Question 761932: Dear Tutor
Could you please help me with this question and can you please show me the solution.If the first 3 items of a geometric progression are a − 1, a + 3, and 3a + 1 for some positive number a, what is the numerical value of the fourth term?
Answer by mohits610@gmail.com(6) About Me  (Show Source):
You can put this solution on YOUR website!
You know that for numbers to be in GP, the ratio of second number and first number should be equal to ratio of third number and second number and so on....
Thus,
(a+3)/(a-1) should be equal to (3a+1)/(a+3).
By solving this u will obtain the value of a.