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Finding the Fourth Proportional to 521,229.70, 781,905.30 and 166,279.60

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Solution

The fourth proportional to 521,229.70, 781,905.30 and 166,279.60 is: 249,438.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,229.70 : 781,905.30 = 166,279.60 : x
  2. Step 2: Convert to fraction form
    521,229.70/781,905.30 = 166,279.60/x
  3. Step 3: Cross multiply
    521,229.70x = 781,905.30 × 166,279.60
  4. Step 4: Simplify right side
    521,229.70x = 130,014,900,521.88
  5. Step 5: Solve for x
    x = 130,014,900,521.88/521,229.70
  6. Step 6: Final answer
    x = 249,438.78

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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.