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Finding the Fourth Proportional to 361.05, 541.25 and 129.88

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Solution

The fourth proportional to 361.05, 541.25 and 129.88 is: 194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.05 : 541.25 = 129.88 : x
  2. Step 2: Convert to fraction form
    361.05/541.25 = 129.88/x
  3. Step 3: Cross multiply
    361.05x = 541.25 × 129.88
  4. Step 4: Simplify right side
    361.05x = 70,296.90
  5. Step 5: Solve for x
    x = 70,296.90/361.05
  6. Step 6: Final answer
    x = 194.70

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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.