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Finding the Fourth Proportional to 361.33, 542.05 and 258.44

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Solution

The fourth proportional to 361.33, 542.05 and 258.44 is: 387.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.33 : 542.05 = 258.44 : x
  2. Step 2: Convert to fraction form
    361.33/542.05 = 258.44/x
  3. Step 3: Cross multiply
    361.33x = 542.05 × 258.44
  4. Step 4: Simplify right side
    361.33x = 140,087.40
  5. Step 5: Solve for x
    x = 140,087.40/361.33
  6. Step 6: Final answer
    x = 387.70

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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.