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Finding the Third Proportional to 391,967 and 858,669

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Solution

The third proportional to 391,967 and 858,669 is: 1,881,057.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,967 : 858,669 = 858,669 : x
  2. Step 2: Convert to fraction form
    391,967/858,669 = 858,669/x
  3. Step 3: Cross multiply
    391,967x = 858,669 × 858,669
  4. Step 4: Simplify right side
    391,967x = 737,312,451,561
  5. Step 5: Solve for x
    x = 737,312,451,561/391,967
  6. Step 6: Final answer
    x = 1,881,057.47

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.