Home / 819,922.20-1,230,113.70-399,211.80

Finding the Fourth Proportional to 819,922.20, 1,230,113.70 and 399,211.80

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Solution

The fourth proportional to 819,922.20, 1,230,113.70 and 399,211.80 is: 598,929.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,922.20 : 1,230,113.70 = 399,211.80 : x
  2. Step 2: Convert to fraction form
    819,922.20/1,230,113.70 = 399,211.80/x
  3. Step 3: Cross multiply
    819,922.20x = 1,230,113.70 × 399,211.80
  4. Step 4: Simplify right side
    819,922.20x = 491,075,904,381.66
  5. Step 5: Solve for x
    x = 491,075,904,381.66/819,922.20
  6. Step 6: Final answer
    x = 598,929.88

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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.