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Finding the Fourth Proportional to 353.92, 531.06 and 161.68

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Solution

The fourth proportional to 353.92, 531.06 and 161.68 is: 242.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.92 : 531.06 = 161.68 : x
  2. Step 2: Convert to fraction form
    353.92/531.06 = 161.68/x
  3. Step 3: Cross multiply
    353.92x = 531.06 × 161.68
  4. Step 4: Simplify right side
    353.92x = 85,861.78
  5. Step 5: Solve for x
    x = 85,861.78/353.92
  6. Step 6: Final answer
    x = 242.60

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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.