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Finding the Third Proportional to 126,261 and 278,766

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Solution

The third proportional to 126,261 and 278,766 is: 615,474.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,261 : 278,766 = 278,766 : x
  2. Step 2: Convert to fraction form
    126,261/278,766 = 278,766/x
  3. Step 3: Cross multiply
    126,261x = 278,766 × 278,766
  4. Step 4: Simplify right side
    126,261x = 77,710,482,756
  5. Step 5: Solve for x
    x = 77,710,482,756/126,261
  6. Step 6: Final answer
    x = 615,474.95

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.