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Finding the Fourth Proportional to 361.93, 542.89 and 254.20

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Solution

The fourth proportional to 361.93, 542.89 and 254.20 is: 381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.93 : 542.89 = 254.20 : x
  2. Step 2: Convert to fraction form
    361.93/542.89 = 254.20/x
  3. Step 3: Cross multiply
    361.93x = 542.89 × 254.20
  4. Step 4: Simplify right side
    361.93x = 138,002.58
  5. Step 5: Solve for x
    x = 138,002.58/361.93
  6. Step 6: Final answer
    x = 381.30

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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.