Home / 819,934.20-1,230,131.70-399,223.80

Finding the Fourth Proportional to 819,934.20, 1,230,131.70 and 399,223.80

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Solution

The fourth proportional to 819,934.20, 1,230,131.70 and 399,223.80 is: 598,947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,934.20 : 1,230,131.70 = 399,223.80 : x
  2. Step 2: Convert to fraction form
    819,934.20/1,230,131.70 = 399,223.80/x
  3. Step 3: Cross multiply
    819,934.20x = 1,230,131.70 × 399,223.80
  4. Step 4: Simplify right side
    819,934.20x = 491,097,851,774.46
  5. Step 5: Solve for x
    x = 491,097,851,774.46/819,934.20
  6. Step 6: Final answer
    x = 598,947.88

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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.