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Finding the Fourth Proportional to 381.01, 571.21 and 149.86

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Solution

The fourth proportional to 381.01, 571.21 and 149.86 is: 224.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.01 : 571.21 = 149.86 : x
  2. Step 2: Convert to fraction form
    381.01/571.21 = 149.86/x
  3. Step 3: Cross multiply
    381.01x = 571.21 × 149.86
  4. Step 4: Simplify right side
    381.01x = 85,601.53
  5. Step 5: Solve for x
    x = 85,601.53/381.01
  6. Step 6: Final answer
    x = 224.67

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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.