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Finding the Fourth Proportional to 351,758.43, 527,630.36 and 85,520.34

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Solution

The fourth proportional to 351,758.43, 527,630.36 and 85,520.34 is: 128,278.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,758.43 : 527,630.36 = 85,520.34 : x
  2. Step 2: Convert to fraction form
    351,758.43/527,630.36 = 85,520.34/x
  3. Step 3: Cross multiply
    351,758.43x = 527,630.36 × 85,520.34
  4. Step 4: Simplify right side
    351,758.43x = 45,123,127,353.92
  5. Step 5: Solve for x
    x = 45,123,127,353.92/351,758.43
  6. Step 6: Final answer
    x = 128,278.74

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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.