Home / 521,761.20-782,204.40-272,443.20

Finding the Fourth Proportional to 521,761.20, 782,204.40 and 272,443.20

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Solution

The fourth proportional to 521,761.20, 782,204.40 and 272,443.20 is: 408,436.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,761.20 : 782,204.40 = 272,443.20 : x
  2. Step 2: Convert to fraction form
    521,761.20/782,204.40 = 272,443.20/x
  3. Step 3: Cross multiply
    521,761.20x = 782,204.40 × 272,443.20
  4. Step 4: Simplify right side
    521,761.20x = 213,106,269,790.08
  5. Step 5: Solve for x
    x = 213,106,269,790.08/521,761.20
  6. Step 6: Final answer
    x = 408,436.41

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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.