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Finding the Third Proportional to 396,315 and 613,791

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Solution

The third proportional to 396,315 and 613,791 is: 950,605.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,315 : 613,791 = 613,791 : x
  2. Step 2: Convert to fraction form
    396,315/613,791 = 613,791/x
  3. Step 3: Cross multiply
    396,315x = 613,791 × 613,791
  4. Step 4: Simplify right side
    396,315x = 376,739,391,681
  5. Step 5: Solve for x
    x = 376,739,391,681/396,315
  6. Step 6: Final answer
    x = 950,605.94

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.