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Finding the Fourth Proportional to 360.32, 540.54 and 129.22

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Solution

The fourth proportional to 360.32, 540.54 and 129.22 is: 193.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.32 : 540.54 = 129.22 : x
  2. Step 2: Convert to fraction form
    360.32/540.54 = 129.22/x
  3. Step 3: Cross multiply
    360.32x = 540.54 × 129.22
  4. Step 4: Simplify right side
    360.32x = 69,848.58
  5. Step 5: Solve for x
    x = 69,848.58/360.32
  6. Step 6: Final answer
    x = 193.85

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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.