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Finding the Fourth Proportional to 381.01, 571.17 and 185.90

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Solution

The fourth proportional to 381.01, 571.17 and 185.90 is: 278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.01 : 571.17 = 185.90 : x
  2. Step 2: Convert to fraction form
    381.01/571.17 = 185.90/x
  3. Step 3: Cross multiply
    381.01x = 571.17 × 185.90
  4. Step 4: Simplify right side
    381.01x = 106,179.57
  5. Step 5: Solve for x
    x = 106,179.57/381.01
  6. Step 6: Final answer
    x = 278.68

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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.