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Finding the Fourth Proportional to 521,123.70, 781,102.35 and 221,553.30

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Solution

The fourth proportional to 521,123.70, 781,102.35 and 221,553.30 is: 332,082.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,123.70 : 781,102.35 = 221,553.30 : x
  2. Step 2: Convert to fraction form
    521,123.70/781,102.35 = 221,553.30/x
  3. Step 3: Cross multiply
    521,123.70x = 781,102.35 × 221,553.30
  4. Step 4: Simplify right side
    521,123.70x = 173,055,803,280.26
  5. Step 5: Solve for x
    x = 173,055,803,280.26/521,123.70
  6. Step 6: Final answer
    x = 332,082.01

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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.