Home / 819,983.20-1,230,205.20-399,272.80

Finding the Fourth Proportional to 819,983.20, 1,230,205.20 and 399,272.80

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Solution

The fourth proportional to 819,983.20, 1,230,205.20 and 399,272.80 is: 599,021.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,983.20 : 1,230,205.20 = 399,272.80 : x
  2. Step 2: Convert to fraction form
    819,983.20/1,230,205.20 = 399,272.80/x
  3. Step 3: Cross multiply
    819,983.20x = 1,230,205.20 × 399,272.80
  4. Step 4: Simplify right side
    819,983.20x = 491,187,474,778.56
  5. Step 5: Solve for x
    x = 491,187,474,778.56/819,983.20
  6. Step 6: Final answer
    x = 599,021.39

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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.