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Finding the Fourth Proportional to 238.74, 327.87 and 221.82

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Solution

The fourth proportional to 238.74, 327.87 and 221.82 is: 304.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.74 : 327.87 = 221.82 : x
  2. Step 2: Convert to fraction form
    238.74/327.87 = 221.82/x
  3. Step 3: Cross multiply
    238.74x = 327.87 × 221.82
  4. Step 4: Simplify right side
    238.74x = 72,728.12
  5. Step 5: Solve for x
    x = 72,728.12/238.74
  6. Step 6: Final answer
    x = 304.63

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.