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Finding the Third Proportional to 218,540 and 337,515

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Solution

The third proportional to 218,540 and 337,515 is: 521,260.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,540 : 337,515 = 337,515 : x
  2. Step 2: Convert to fraction form
    218,540/337,515 = 337,515/x
  3. Step 3: Cross multiply
    218,540x = 337,515 × 337,515
  4. Step 4: Simplify right side
    218,540x = 113,916,375,225
  5. Step 5: Solve for x
    x = 113,916,375,225/218,540
  6. Step 6: Final answer
    x = 521,260.98

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.