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Finding the Third Proportional to 218,486 and 329,734

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Solution

The third proportional to 218,486 and 329,734 is: 497,626.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,486 : 329,734 = 329,734 : x
  2. Step 2: Convert to fraction form
    218,486/329,734 = 329,734/x
  3. Step 3: Cross multiply
    218,486x = 329,734 × 329,734
  4. Step 4: Simplify right side
    218,486x = 108,724,510,756
  5. Step 5: Solve for x
    x = 108,724,510,756/218,486
  6. Step 6: Final answer
    x = 497,626.90

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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.