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Finding the Fourth Proportional to 551,131.97, 826,488.12 and 326,555.78

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Solution

The fourth proportional to 551,131.97, 826,488.12 and 326,555.78 is: 489,709.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,131.97 : 826,488.12 = 326,555.78 : x
  2. Step 2: Convert to fraction form
    551,131.97/826,488.12 = 326,555.78/x
  3. Step 3: Cross multiply
    551,131.97x = 826,488.12 × 326,555.78
  4. Step 4: Simplify right side
    551,131.97x = 269,894,472,687.33
  5. Step 5: Solve for x
    x = 269,894,472,687.33/551,131.97
  6. Step 6: Final answer
    x = 489,709.34

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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.