Finding the Third Proportional to 1.31 and 2.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1.31 : 2.72 = 2.72 : x
2. Step 2: Convert to fraction form
   1.31/2.72 = 2.72/x
3. Step 3: Cross multiply
   1.31x = 2.72 × 2.72
4. Step 4: Simplify right side
   1.31x = 7.39
5. Step 5: Solve for x
   x = 7.39/1.31
6. Step 6: Final answer
   x = 5.63