Finding the Third Proportional to 279.50 and 375.25

Step by Step Solution

1. Step 1: Write the proportion equation
   279.50 : 375.25 = 375.25 : x
2. Step 2: Convert to fraction form
   279.50/375.25 = 375.25/x
3. Step 3: Cross multiply
   279.50x = 375.25 × 375.25
4. Step 4: Simplify right side
   279.50x = 140,812.56
5. Step 5: Solve for x
   x = 140,812.56/279.50
6. Step 6: Final answer
   x = 503.80