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Finding the Fourth Proportional to 381.15, 571.33 and 149.94

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Solution

The fourth proportional to 381.15, 571.33 and 149.94 is: 224.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.15 : 571.33 = 149.94 : x
  2. Step 2: Convert to fraction form
    381.15/571.33 = 149.94/x
  3. Step 3: Cross multiply
    381.15x = 571.33 × 149.94
  4. Step 4: Simplify right side
    381.15x = 85,667.27
  5. Step 5: Solve for x
    x = 85,667.27/381.15
  6. Step 6: Final answer
    x = 224.76

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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.