Home / 819,124,680.20-1,228,687,020.30-543,625,665.80

Finding the Fourth Proportional to 819,124,680.20, 1,228,687,020.30 and 543,625,665.80

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Solution

The fourth proportional to 819,124,680.20, 1,228,687,020.30 and 543,625,665.80 is: 815,438,498.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,124,680.20 : 1,228,687,020.30 = 543,625,665.80 : x
  2. Step 2: Convert to fraction form
    819,124,680.20/1,228,687,020.30 = 543,625,665.80/x
  3. Step 3: Cross multiply
    819,124,680.20x = 1,228,687,020.30 × 543,625,665.80
  4. Step 4: Simplify right side
    819,124,680.20x = 667,945,799,470,405,504
  5. Step 5: Solve for x
    x = 667,945,799,470,405,504/819,124,680.20
  6. Step 6: Final answer
    x = 815,438,498.70

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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.