Home / 819,940.20-1,230,140.70-399,229.80

Finding the Fourth Proportional to 819,940.20, 1,230,140.70 and 399,229.80

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Solution

The fourth proportional to 819,940.20, 1,230,140.70 and 399,229.80 is: 598,956.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,940.20 : 1,230,140.70 = 399,229.80 : x
  2. Step 2: Convert to fraction form
    819,940.20/1,230,140.70 = 399,229.80/x
  3. Step 3: Cross multiply
    819,940.20x = 1,230,140.70 × 399,229.80
  4. Step 4: Simplify right side
    819,940.20x = 491,108,825,632.86
  5. Step 5: Solve for x
    x = 491,108,825,632.86/819,940.20
  6. Step 6: Final answer
    x = 598,956.88

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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.