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Finding the Third Proportional to 187,769 and 391,063

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Solution

The third proportional to 187,769 and 391,063 is: 814,459.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,769 : 391,063 = 391,063 : x
  2. Step 2: Convert to fraction form
    187,769/391,063 = 391,063/x
  3. Step 3: Cross multiply
    187,769x = 391,063 × 391,063
  4. Step 4: Simplify right side
    187,769x = 152,930,269,969
  5. Step 5: Solve for x
    x = 152,930,269,969/187,769
  6. Step 6: Final answer
    x = 814,459.63

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.