Find the Missing Number in the Sequence: (1/9), (1/3), 1, ____ , 9

Look at the series of numbers in this riddle and find the connection between them.

Find the missing number in the sequence:

(1/9), (1/3), 1, ____ , 9

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It is a simple series where each next number is multiplied by 3.

1/9 x 3 = 1/3

1/3 x 3 = 1

So we can find the missing number as;

1 x 3 = 3

and verify this by checking for the next number;

3 x 3 = 9

So answer = 3