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Finding the Fourth Proportional to 381.71, 573.15 and 238.34

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Solution

The fourth proportional to 381.71, 573.15 and 238.34 is: 357.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.71 : 573.15 = 238.34 : x
  2. Step 2: Convert to fraction form
    381.71/573.15 = 238.34/x
  3. Step 3: Cross multiply
    381.71x = 573.15 × 238.34
  4. Step 4: Simplify right side
    381.71x = 136,604.57
  5. Step 5: Solve for x
    x = 136,604.57/381.71
  6. Step 6: Final answer
    x = 357.88

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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.