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Finding the Third Proportional to 87,990 and 207,498

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Solution

The third proportional to 87,990 and 207,498 is: 489,321.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,990 : 207,498 = 207,498 : x
  2. Step 2: Convert to fraction form
    87,990/207,498 = 207,498/x
  3. Step 3: Cross multiply
    87,990x = 207,498 × 207,498
  4. Step 4: Simplify right side
    87,990x = 43,055,420,004
  5. Step 5: Solve for x
    x = 43,055,420,004/87,990
  6. Step 6: Final answer
    x = 489,321.74

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.