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Finding the Fourth Proportional to 667,634.38, 921,335.44 and 365,821.90

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Solution

The fourth proportional to 667,634.38, 921,335.44 and 365,821.90 is: 504,834.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,634.38 : 921,335.44 = 365,821.90 : x
  2. Step 2: Convert to fraction form
    667,634.38/921,335.44 = 365,821.90/x
  3. Step 3: Cross multiply
    667,634.38x = 921,335.44 × 365,821.90
  4. Step 4: Simplify right side
    667,634.38x = 337,044,681,198.14
  5. Step 5: Solve for x
    x = 337,044,681,198.14/667,634.38
  6. Step 6: Final answer
    x = 504,834.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.