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Finding the Third Proportional to 218,538 and 329,817

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Solution

The third proportional to 218,538 and 329,817 is: 497,758.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,538 : 329,817 = 329,817 : x
  2. Step 2: Convert to fraction form
    218,538/329,817 = 329,817/x
  3. Step 3: Cross multiply
    218,538x = 329,817 × 329,817
  4. Step 4: Simplify right side
    218,538x = 108,779,253,489
  5. Step 5: Solve for x
    x = 108,779,253,489/218,538
  6. Step 6: Final answer
    x = 497,758.99

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.