Let's denote the length of the beginner trail as
According to the information provided:
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The medium trail is 1.2 times as long as the beginner trail:
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The advanced trail is 3.6 times as long as the medium trail:
Substituting the expression for
Now, calculate
So, we have:
This means the advanced trail is 4.32 times as long as the beginner trail.
Thus, the answer is: