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Finding the Fourth Proportional to 361.87, 542.36 and 156

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Solution

The fourth proportional to 361.87, 542.36 and 156 is: 233.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.87 : 542.36 = 156 : x
  2. Step 2: Convert to fraction form
    361.87/542.36 = 156/x
  3. Step 3: Cross multiply
    361.87x = 542.36 × 156
  4. Step 4: Simplify right side
    361.87x = 84,608.16
  5. Step 5: Solve for x
    x = 84,608.16/361.87
  6. Step 6: Final answer
    x = 233.81

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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.