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Finding the Fourth Proportional to 395,115.20, 590,923.20 and 332,129.60

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Solution

The fourth proportional to 395,115.20, 590,923.20 and 332,129.60 is: 496,723.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,115.20 : 590,923.20 = 332,129.60 : x
  2. Step 2: Convert to fraction form
    395,115.20/590,923.20 = 332,129.60/x
  3. Step 3: Cross multiply
    395,115.20x = 590,923.20 × 332,129.60
  4. Step 4: Simplify right side
    395,115.20x = 196,263,086,046.72
  5. Step 5: Solve for x
    x = 196,263,086,046.72/395,115.20
  6. Step 6: Final answer
    x = 496,723.71

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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.