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Finding the Third Proportional to 656,860 and 988,206

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Solution

The third proportional to 656,860 and 988,206 is: 1,486,695.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,860 : 988,206 = 988,206 : x
  2. Step 2: Convert to fraction form
    656,860/988,206 = 988,206/x
  3. Step 3: Cross multiply
    656,860x = 988,206 × 988,206
  4. Step 4: Simplify right side
    656,860x = 976,551,098,436
  5. Step 5: Solve for x
    x = 976,551,098,436/656,860
  6. Step 6: Final answer
    x = 1,486,695.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.