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Finding the Fourth Proportional to 360.68, 540.92 and 129.53

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Solution

The fourth proportional to 360.68, 540.92 and 129.53 is: 194.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.68 : 540.92 = 129.53 : x
  2. Step 2: Convert to fraction form
    360.68/540.92 = 129.53/x
  3. Step 3: Cross multiply
    360.68x = 540.92 × 129.53
  4. Step 4: Simplify right side
    360.68x = 70,062.02
  5. Step 5: Solve for x
    x = 70,062.02/360.68
  6. Step 6: Final answer
    x = 194.25

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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.