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Finding the Third Proportional to 555,790 and 861,145

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Solution

The third proportional to 555,790 and 861,145 is: 1,334,264.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,790 : 861,145 = 861,145 : x
  2. Step 2: Convert to fraction form
    555,790/861,145 = 861,145/x
  3. Step 3: Cross multiply
    555,790x = 861,145 × 861,145
  4. Step 4: Simplify right side
    555,790x = 741,570,711,025
  5. Step 5: Solve for x
    x = 741,570,711,025/555,790
  6. Step 6: Final answer
    x = 1,334,264.22

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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.