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Finding the Third Proportional to 217,469 and 260,543

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Solution

The third proportional to 217,469 and 260,543 is: 312,148.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,469 : 260,543 = 260,543 : x
  2. Step 2: Convert to fraction form
    217,469/260,543 = 260,543/x
  3. Step 3: Cross multiply
    217,469x = 260,543 × 260,543
  4. Step 4: Simplify right side
    217,469x = 67,882,654,849
  5. Step 5: Solve for x
    x = 67,882,654,849/217,469
  6. Step 6: Final answer
    x = 312,148.65

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.