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Finding the Fourth Proportional to 361.35, 542.12 and 144.81

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Solution

The fourth proportional to 361.35, 542.12 and 144.81 is: 217.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.35 : 542.12 = 144.81 : x
  2. Step 2: Convert to fraction form
    361.35/542.12 = 144.81/x
  3. Step 3: Cross multiply
    361.35x = 542.12 × 144.81
  4. Step 4: Simplify right side
    361.35x = 78,503.67
  5. Step 5: Solve for x
    x = 78,503.67/361.35
  6. Step 6: Final answer
    x = 217.25

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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.