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Finding the Fourth Proportional to 360.63, 540.90 and 129.53

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Solution

The fourth proportional to 360.63, 540.90 and 129.53 is: 194.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.63 : 540.90 = 129.53 : x
  2. Step 2: Convert to fraction form
    360.63/540.90 = 129.53/x
  3. Step 3: Cross multiply
    360.63x = 540.90 × 129.53
  4. Step 4: Simplify right side
    360.63x = 70,064.13
  5. Step 5: Solve for x
    x = 70,064.13/360.63
  6. Step 6: Final answer
    x = 194.28

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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.