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Finding the Third Proportional to 655,208 and 987,430

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Solution

The third proportional to 655,208 and 987,430 is: 1,488,104.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,208 : 987,430 = 987,430 : x
  2. Step 2: Convert to fraction form
    655,208/987,430 = 987,430/x
  3. Step 3: Cross multiply
    655,208x = 987,430 × 987,430
  4. Step 4: Simplify right side
    655,208x = 975,018,004,900
  5. Step 5: Solve for x
    x = 975,018,004,900/655,208
  6. Step 6: Final answer
    x = 1,488,104.55

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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.