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Finding the Third Proportional to 207,990 and 297,436

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Solution

The third proportional to 207,990 and 297,436 is: 425,348.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,990 : 297,436 = 297,436 : x
  2. Step 2: Convert to fraction form
    207,990/297,436 = 297,436/x
  3. Step 3: Cross multiply
    207,990x = 297,436 × 297,436
  4. Step 4: Simplify right side
    207,990x = 88,468,174,096
  5. Step 5: Solve for x
    x = 88,468,174,096/207,990
  6. Step 6: Final answer
    x = 425,348.21

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.