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Finding the Fourth Proportional to 361.33, 542.18 and 155.84

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Solution

The fourth proportional to 361.33, 542.18 and 155.84 is: 233.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.33 : 542.18 = 155.84 : x
  2. Step 2: Convert to fraction form
    361.33/542.18 = 155.84/x
  3. Step 3: Cross multiply
    361.33x = 542.18 × 155.84
  4. Step 4: Simplify right side
    361.33x = 84,493.33
  5. Step 5: Solve for x
    x = 84,493.33/361.33
  6. Step 6: Final answer
    x = 233.84

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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.