To solve the problem, we need to establish the relationships between the lengths of the trails.
- Let the length of the Beginner's Trail be \( B \).
- The Medium Trail is 1.2 times as long as the Beginner's Trail, so: \[ M = 1.2B \]
- The Advanced Trail is 3.6 times as long as the Medium Trail, so: \[ A = 3.6M \] Now, substituting \( M \) from the previous equation: \[ A = 3.6(1.2B) \]
Now, we will multiply \( 3.6 \) and \( 1.2 \): \[ A = 3.6 \times 1.2 \times B \]
Calculating \( 3.6 \times 1.2 \): \[ 3.6 \times 1.2 = 4.32 \]
Thus, we have: \[ A = 4.32B \]
This tells us that the Advanced Trail is 4.32 times as long as the Beginner's Trail.
So, the final answer is: \[ \boxed{4.3} \] (rounded to one decimal place)