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Finding the Fourth Proportional to 238.20, 355.60 and 201.74

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Solution

The fourth proportional to 238.20, 355.60 and 201.74 is: 301.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.20 : 355.60 = 201.74 : x
  2. Step 2: Convert to fraction form
    238.20/355.60 = 201.74/x
  3. Step 3: Cross multiply
    238.20x = 355.60 × 201.74
  4. Step 4: Simplify right side
    238.20x = 71,738.74
  5. Step 5: Solve for x
    x = 71,738.74/238.20
  6. Step 6: Final answer
    x = 301.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.