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Finding the Third Proportional to 655,222 and 987,455

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Solution

The third proportional to 655,222 and 987,455 is: 1,488,148.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,222 : 987,455 = 987,455 : x
  2. Step 2: Convert to fraction form
    655,222/987,455 = 987,455/x
  3. Step 3: Cross multiply
    655,222x = 987,455 × 987,455
  4. Step 4: Simplify right side
    655,222x = 975,067,377,025
  5. Step 5: Solve for x
    x = 975,067,377,025/655,222
  6. Step 6: Final answer
    x = 1,488,148.10

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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.