Finding the Third Proportional to 279.75 and 481.31

Step by Step Solution

1. Step 1: Write the proportion equation
   279.75 : 481.31 = 481.31 : x
2. Step 2: Convert to fraction form
   279.75/481.31 = 481.31/x
3. Step 3: Cross multiply
   279.75x = 481.31 × 481.31
4. Step 4: Simplify right side
   279.75x = 231,661.72
5. Step 5: Solve for x
   x = 231,661.72/279.75
6. Step 6: Final answer
   x = 828.10