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Finding the Fourth Proportional to 238.71, 357.39 and 225.90

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Solution

The fourth proportional to 238.71, 357.39 and 225.90 is: 338.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.71 : 357.39 = 225.90 : x
  2. Step 2: Convert to fraction form
    238.71/357.39 = 225.90/x
  3. Step 3: Cross multiply
    238.71x = 357.39 × 225.90
  4. Step 4: Simplify right side
    238.71x = 80,734.40
  5. Step 5: Solve for x
    x = 80,734.40/238.71
  6. Step 6: Final answer
    x = 338.21

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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.