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Finding the Fourth Proportional to 391,529.80, 587,294.70 and 265,230.55

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Solution

The fourth proportional to 391,529.80, 587,294.70 and 265,230.55 is: 397,845.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,529.80 : 587,294.70 = 265,230.55 : x
  2. Step 2: Convert to fraction form
    391,529.80/587,294.70 = 265,230.55/x
  3. Step 3: Cross multiply
    391,529.80x = 587,294.70 × 265,230.55
  4. Step 4: Simplify right side
    391,529.80x = 155,768,496,293.09
  5. Step 5: Solve for x
    x = 155,768,496,293.09/391,529.80
  6. Step 6: Final answer
    x = 397,845.83

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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.