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Finding the Fourth Proportional to 360.79, 541.04 and 129.61

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Solution

The fourth proportional to 360.79, 541.04 and 129.61 is: 194.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.79 : 541.04 = 129.61 : x
  2. Step 2: Convert to fraction form
    360.79/541.04 = 129.61/x
  3. Step 3: Cross multiply
    360.79x = 541.04 × 129.61
  4. Step 4: Simplify right side
    360.79x = 70,123.55
  5. Step 5: Solve for x
    x = 70,123.55/360.79
  6. Step 6: Final answer
    x = 194.36

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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.