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Finding the Third Proportional to 99,940 and 217,292

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Solution

The third proportional to 99,940 and 217,292 is: 472,441.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,940 : 217,292 = 217,292 : x
  2. Step 2: Convert to fraction form
    99,940/217,292 = 217,292/x
  3. Step 3: Cross multiply
    99,940x = 217,292 × 217,292
  4. Step 4: Simplify right side
    99,940x = 47,215,813,264
  5. Step 5: Solve for x
    x = 47,215,813,264/99,940
  6. Step 6: Final answer
    x = 472,441.60

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.