Finding the Third Proportional to 221.75 and 301.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221.75 : 301.50 = 301.50 : x
2. Step 2: Convert to fraction form
   221.75/301.50 = 301.50/x
3. Step 3: Cross multiply
   221.75x = 301.50 × 301.50
4. Step 4: Simplify right side
   221.75x = 90,902.25
5. Step 5: Solve for x
   x = 90,902.25/221.75
6. Step 6: Final answer
   x = 409.93