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Finding the Fourth Proportional to 360.20, 540.36 and 129.03

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Solution

The fourth proportional to 360.20, 540.36 and 129.03 is: 193.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.20 : 540.36 = 129.03 : x
  2. Step 2: Convert to fraction form
    360.20/540.36 = 129.03/x
  3. Step 3: Cross multiply
    360.20x = 540.36 × 129.03
  4. Step 4: Simplify right side
    360.20x = 69,719.30
  5. Step 5: Solve for x
    x = 69,719.30/360.20
  6. Step 6: Final answer
    x = 193.56

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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.