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Finding the Fourth Proportional to 361.28, 542.16 and 144.96

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Solution

The fourth proportional to 361.28, 542.16 and 144.96 is: 217.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.28 : 542.16 = 144.96 : x
  2. Step 2: Convert to fraction form
    361.28/542.16 = 144.96/x
  3. Step 3: Cross multiply
    361.28x = 542.16 × 144.96
  4. Step 4: Simplify right side
    361.28x = 78,591.51
  5. Step 5: Solve for x
    x = 78,591.51/361.28
  6. Step 6: Final answer
    x = 217.54

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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.