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Finding the Fourth Proportional to 819,246.20, 1,229,042.10 and 345,687.80

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Solution

The fourth proportional to 819,246.20, 1,229,042.10 and 345,687.80 is: 518,604.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,246.20 : 1,229,042.10 = 345,687.80 : x
  2. Step 2: Convert to fraction form
    819,246.20/1,229,042.10 = 345,687.80/x
  3. Step 3: Cross multiply
    819,246.20x = 1,229,042.10 × 345,687.80
  4. Step 4: Simplify right side
    819,246.20x = 424,864,859,656.38
  5. Step 5: Solve for x
    x = 424,864,859,656.38/819,246.20
  6. Step 6: Final answer
    x = 518,604.61

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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.