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Finding the Third Proportional to 126,931 and 278,775

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Solution

The third proportional to 126,931 and 278,775 is: 612,265.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,931 : 278,775 = 278,775 : x
  2. Step 2: Convert to fraction form
    126,931/278,775 = 278,775/x
  3. Step 3: Cross multiply
    126,931x = 278,775 × 278,775
  4. Step 4: Simplify right side
    126,931x = 77,715,500,625
  5. Step 5: Solve for x
    x = 77,715,500,625/126,931
  6. Step 6: Final answer
    x = 612,265.72

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.