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Finding the Fourth Proportional to 656,481.20, 984,138.60 and 389,958.80

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Solution

The fourth proportional to 656,481.20, 984,138.60 and 389,958.80 is: 584,591.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,481.20 : 984,138.60 = 389,958.80 : x
  2. Step 2: Convert to fraction form
    656,481.20/984,138.60 = 389,958.80/x
  3. Step 3: Cross multiply
    656,481.20x = 984,138.60 × 389,958.80
  4. Step 4: Simplify right side
    656,481.20x = 383,773,507,489.68
  5. Step 5: Solve for x
    x = 383,773,507,489.68/656,481.20
  6. Step 6: Final answer
    x = 584,591.77

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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.