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Finding the Third Proportional to 378,489 and 826,637

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Solution

The third proportional to 378,489 and 826,637 is: 1,805,412.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,489 : 826,637 = 826,637 : x
  2. Step 2: Convert to fraction form
    378,489/826,637 = 826,637/x
  3. Step 3: Cross multiply
    378,489x = 826,637 × 826,637
  4. Step 4: Simplify right side
    378,489x = 683,328,729,769
  5. Step 5: Solve for x
    x = 683,328,729,769/378,489
  6. Step 6: Final answer
    x = 1,805,412.39

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.