Home / 656,443.20-984,081.60-389,920.80

Finding the Fourth Proportional to 656,443.20, 984,081.60 and 389,920.80

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Solution

The fourth proportional to 656,443.20, 984,081.60 and 389,920.80 is: 584,534.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,443.20 : 984,081.60 = 389,920.80 : x
  2. Step 2: Convert to fraction form
    656,443.20/984,081.60 = 389,920.80/x
  3. Step 3: Cross multiply
    656,443.20x = 984,081.60 × 389,920.80
  4. Step 4: Simplify right side
    656,443.20x = 383,713,884,737.28
  5. Step 5: Solve for x
    x = 383,713,884,737.28/656,443.20
  6. Step 6: Final answer
    x = 584,534.78

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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.