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Finding the Fourth Proportional to 331,327.90, 496,991.85 and 278,839.90

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Solution

The fourth proportional to 331,327.90, 496,991.85 and 278,839.90 is: 418,259.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,327.90 : 496,991.85 = 278,839.90 : x
  2. Step 2: Convert to fraction form
    331,327.90/496,991.85 = 278,839.90/x
  3. Step 3: Cross multiply
    331,327.90x = 496,991.85 × 278,839.90
  4. Step 4: Simplify right side
    331,327.90x = 138,581,157,754.82
  5. Step 5: Solve for x
    x = 138,581,157,754.82/331,327.90
  6. Step 6: Final answer
    x = 418,259.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.