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Finding the Fourth Proportional to 860,479.20, 1,290,718 and 261,437.92

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Solution

The fourth proportional to 860,479.20, 1,290,718 and 261,437.92 is: 392,156.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,479.20 : 1,290,718 = 261,437.92 : x
  2. Step 2: Convert to fraction form
    860,479.20/1,290,718 = 261,437.92/x
  3. Step 3: Cross multiply
    860,479.20x = 1,290,718 × 261,437.92
  4. Step 4: Simplify right side
    860,479.20x = 337,442,629,226.56
  5. Step 5: Solve for x
    x = 337,442,629,226.56/860,479.20
  6. Step 6: Final answer
    x = 392,156.64

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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.