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Finding the Fourth Proportional to 391,847.62, 540,249.12 and 253,782.61

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Solution

The fourth proportional to 391,847.62, 540,249.12 and 253,782.61 is: 349,895.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,847.62 : 540,249.12 = 253,782.61 : x
  2. Step 2: Convert to fraction form
    391,847.62/540,249.12 = 253,782.61/x
  3. Step 3: Cross multiply
    391,847.62x = 540,249.12 × 253,782.61
  4. Step 4: Simplify right side
    391,847.62x = 137,105,831,723.80
  5. Step 5: Solve for x
    x = 137,105,831,723.80/391,847.62
  6. Step 6: Final answer
    x = 349,895.79

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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.