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Finding the Third Proportional to 555,780 and 861,126

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Solution

The third proportional to 555,780 and 861,126 is: 1,334,229.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,780 : 861,126 = 861,126 : x
  2. Step 2: Convert to fraction form
    555,780/861,126 = 861,126/x
  3. Step 3: Cross multiply
    555,780x = 861,126 × 861,126
  4. Step 4: Simplify right side
    555,780x = 741,537,987,876
  5. Step 5: Solve for x
    x = 741,537,987,876/555,780
  6. Step 6: Final answer
    x = 1,334,229.35

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.