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Finding the Fourth Proportional to 381.15, 571.62 and 149.88

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Solution

The fourth proportional to 381.15, 571.62 and 149.88 is: 224.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.15 : 571.62 = 149.88 : x
  2. Step 2: Convert to fraction form
    381.15/571.62 = 149.88/x
  3. Step 3: Cross multiply
    381.15x = 571.62 × 149.88
  4. Step 4: Simplify right side
    381.15x = 85,671.55
  5. Step 5: Solve for x
    x = 85,671.55/381.15
  6. Step 6: Final answer
    x = 224.77

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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.