Home / 521,122.20-781,100.10-221,551.80

Finding the Fourth Proportional to 521,122.20, 781,100.10 and 221,551.80

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Solution

The fourth proportional to 521,122.20, 781,100.10 and 221,551.80 is: 332,079.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,122.20 : 781,100.10 = 221,551.80 : x
  2. Step 2: Convert to fraction form
    521,122.20/781,100.10 = 221,551.80/x
  3. Step 3: Cross multiply
    521,122.20x = 781,100.10 × 221,551.80
  4. Step 4: Simplify right side
    521,122.20x = 173,054,133,135.18
  5. Step 5: Solve for x
    x = 173,054,133,135.18/521,122.20
  6. Step 6: Final answer
    x = 332,079.76

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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.