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Finding the Fourth Proportional to 512,562.20, 768,843.30 and 489,234.20

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Solution

The fourth proportional to 512,562.20, 768,843.30 and 489,234.20 is: 733,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,562.20 : 768,843.30 = 489,234.20 : x
  2. Step 2: Convert to fraction form
    512,562.20/768,843.30 = 489,234.20/x
  3. Step 3: Cross multiply
    512,562.20x = 768,843.30 × 489,234.20
  4. Step 4: Simplify right side
    512,562.20x = 376,144,436,800.86
  5. Step 5: Solve for x
    x = 376,144,436,800.86/512,562.20
  6. Step 6: Final answer
    x = 733,851.30

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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.