Finding the Third Proportional to 4.50 and 4.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4.50 : 4.50 = 4.50 : x
2. Step 2: Convert to fraction form
   4.50/4.50 = 4.50/x
3. Step 3: Cross multiply
   4.50x = 4.50 × 4.50
4. Step 4: Simplify right side
   4.50x = 20.25
5. Step 5: Solve for x
   x = 20.25/4.50
6. Step 6: Final answer
   x = 4.50