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Finding the Fourth Proportional to 381.42, 571.73 and 227.30

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Solution

The fourth proportional to 381.42, 571.73 and 227.30 is: 340.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.42 : 571.73 = 227.30 : x
  2. Step 2: Convert to fraction form
    381.42/571.73 = 227.30/x
  3. Step 3: Cross multiply
    381.42x = 571.73 × 227.30
  4. Step 4: Simplify right side
    381.42x = 129,950.23
  5. Step 5: Solve for x
    x = 129,950.23/381.42
  6. Step 6: Final answer
    x = 340.70

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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.