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Finding the Fourth Proportional to 361.91, 543.18 and 167.21

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Solution

The fourth proportional to 361.91, 543.18 and 167.21 is: 250.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.91 : 543.18 = 167.21 : x
  2. Step 2: Convert to fraction form
    361.91/543.18 = 167.21/x
  3. Step 3: Cross multiply
    361.91x = 543.18 × 167.21
  4. Step 4: Simplify right side
    361.91x = 90,822.41
  5. Step 5: Solve for x
    x = 90,822.41/361.91
  6. Step 6: Final answer
    x = 250.96

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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.