Home / 819,961.20-1,230,172.20-399,250.80

Finding the Fourth Proportional to 819,961.20, 1,230,172.20 and 399,250.80

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Solution

The fourth proportional to 819,961.20, 1,230,172.20 and 399,250.80 is: 598,988.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,961.20 : 1,230,172.20 = 399,250.80 : x
  2. Step 2: Convert to fraction form
    819,961.20/1,230,172.20 = 399,250.80/x
  3. Step 3: Cross multiply
    819,961.20x = 1,230,172.20 × 399,250.80
  4. Step 4: Simplify right side
    819,961.20x = 491,147,234,987.76
  5. Step 5: Solve for x
    x = 491,147,234,987.76/819,961.20
  6. Step 6: Final answer
    x = 598,988.39

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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.