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Finding the Third Proportional to 639,290 and 992,553

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Solution

The third proportional to 639,290 and 992,553 is: 1,541,024.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,290 : 992,553 = 992,553 : x
  2. Step 2: Convert to fraction form
    639,290/992,553 = 992,553/x
  3. Step 3: Cross multiply
    639,290x = 992,553 × 992,553
  4. Step 4: Simplify right side
    639,290x = 985,161,457,809
  5. Step 5: Solve for x
    x = 985,161,457,809/639,290
  6. Step 6: Final answer
    x = 1,541,024.35

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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.