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Finding the Third Proportional to 655,218 and 987,449

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Solution

The third proportional to 655,218 and 987,449 is: 1,488,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,218 : 987,449 = 987,449 : x
  2. Step 2: Convert to fraction form
    655,218/987,449 = 987,449/x
  3. Step 3: Cross multiply
    655,218x = 987,449 × 987,449
  4. Step 4: Simplify right side
    655,218x = 975,055,527,601
  5. Step 5: Solve for x
    x = 975,055,527,601/655,218
  6. Step 6: Final answer
    x = 1,488,139.10

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.