Finding the Third Proportional to 308.39 and 451.83

Step by Step Solution

1. Step 1: Write the proportion equation
   308.39 : 451.83 = 451.83 : x
2. Step 2: Convert to fraction form
   308.39/451.83 = 451.83/x
3. Step 3: Cross multiply
   308.39x = 451.83 × 451.83
4. Step 4: Simplify right side
   308.39x = 204,148.65
5. Step 5: Solve for x
   x = 204,148.65/308.39
6. Step 6: Final answer
   x = 661.98