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Finding the Fourth Proportional to 361.42, 542.11 and 166.30

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Solution

The fourth proportional to 361.42, 542.11 and 166.30 is: 249.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.42 : 542.11 = 166.30 : x
  2. Step 2: Convert to fraction form
    361.42/542.11 = 166.30/x
  3. Step 3: Cross multiply
    361.42x = 542.11 × 166.30
  4. Step 4: Simplify right side
    361.42x = 90,152.89
  5. Step 5: Solve for x
    x = 90,152.89/361.42
  6. Step 6: Final answer
    x = 249.44

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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.