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Finding the Third Proportional to 400,864 and 644,738

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Solution

The third proportional to 400,864 and 644,738 is: 1,036,977.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,864 : 644,738 = 644,738 : x
  2. Step 2: Convert to fraction form
    400,864/644,738 = 644,738/x
  3. Step 3: Cross multiply
    400,864x = 644,738 × 644,738
  4. Step 4: Simplify right side
    400,864x = 415,687,088,644
  5. Step 5: Solve for x
    x = 415,687,088,644/400,864
  6. Step 6: Final answer
    x = 1,036,977.85

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.