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Finding the Fourth Proportional to 656,305.80, 984,458.70 and 389,929.20

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Solution

The fourth proportional to 656,305.80, 984,458.70 and 389,929.20 is: 584,893.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,305.80 : 984,458.70 = 389,929.20 : x
  2. Step 2: Convert to fraction form
    656,305.80/984,458.70 = 389,929.20/x
  3. Step 3: Cross multiply
    656,305.80x = 984,458.70 × 389,929.20
  4. Step 4: Simplify right side
    656,305.80x = 383,869,193,324.04
  5. Step 5: Solve for x
    x = 383,869,193,324.04/656,305.80
  6. Step 6: Final answer
    x = 584,893.80

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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.