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Finding the Fourth Proportional to 371.62, 557.46 and 155.21

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Solution

The fourth proportional to 371.62, 557.46 and 155.21 is: 232.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.62 : 557.46 = 155.21 : x
  2. Step 2: Convert to fraction form
    371.62/557.46 = 155.21/x
  3. Step 3: Cross multiply
    371.62x = 557.46 × 155.21
  4. Step 4: Simplify right side
    371.62x = 86,524.76
  5. Step 5: Solve for x
    x = 86,524.76/371.62
  6. Step 6: Final answer
    x = 232.83

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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.