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Finding the Third Proportional to 269,387 and 422,589

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Solution

The third proportional to 269,387 and 422,589 is: 662,917.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,387 : 422,589 = 422,589 : x
  2. Step 2: Convert to fraction form
    269,387/422,589 = 422,589/x
  3. Step 3: Cross multiply
    269,387x = 422,589 × 422,589
  4. Step 4: Simplify right side
    269,387x = 178,581,462,921
  5. Step 5: Solve for x
    x = 178,581,462,921/269,387
  6. Step 6: Final answer
    x = 662,917.89

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.