Home / 521,108.20-781,370.70-221,537.80

Finding the Fourth Proportional to 521,108.20, 781,370.70 and 221,537.80

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Solution

The fourth proportional to 521,108.20, 781,370.70 and 221,537.80 is: 332,182.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,108.20 : 781,370.70 = 221,537.80 : x
  2. Step 2: Convert to fraction form
    521,108.20/781,370.70 = 221,537.80/x
  3. Step 3: Cross multiply
    521,108.20x = 781,370.70 × 221,537.80
  4. Step 4: Simplify right side
    521,108.20x = 173,103,145,862.46
  5. Step 5: Solve for x
    x = 173,103,145,862.46/521,108.20
  6. Step 6: Final answer
    x = 332,182.73

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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.