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Finding the Third Proportional to 131,716 and 278,408

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Solution

The third proportional to 131,716 and 278,408 is: 588,470.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,716 : 278,408 = 278,408 : x
  2. Step 2: Convert to fraction form
    131,716/278,408 = 278,408/x
  3. Step 3: Cross multiply
    131,716x = 278,408 × 278,408
  4. Step 4: Simplify right side
    131,716x = 77,511,014,464
  5. Step 5: Solve for x
    x = 77,511,014,464/131,716
  6. Step 6: Final answer
    x = 588,470.76

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.