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Finding the Fourth Proportional to 360.59, 540.80 and 129.46

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Solution

The fourth proportional to 360.59, 540.80 and 129.46 is: 194.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.59 : 540.80 = 129.46 : x
  2. Step 2: Convert to fraction form
    360.59/540.80 = 129.46/x
  3. Step 3: Cross multiply
    360.59x = 540.80 × 129.46
  4. Step 4: Simplify right side
    360.59x = 70,008.62
  5. Step 5: Solve for x
    x = 70,008.62/360.59
  6. Step 6: Final answer
    x = 194.15

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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.