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Finding the Third Proportional to 221,330 and 332,157

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Solution

The third proportional to 221,330 and 332,157 is: 498,478.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,330 : 332,157 = 332,157 : x
  2. Step 2: Convert to fraction form
    221,330/332,157 = 332,157/x
  3. Step 3: Cross multiply
    221,330x = 332,157 × 332,157
  4. Step 4: Simplify right side
    221,330x = 110,328,272,649
  5. Step 5: Solve for x
    x = 110,328,272,649/221,330
  6. Step 6: Final answer
    x = 498,478.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.