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Finding the Fourth Proportional to 349.31, 481.22 and 238.64

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Solution

The fourth proportional to 349.31, 481.22 and 238.64 is: 328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.31 : 481.22 = 238.64 : x
  2. Step 2: Convert to fraction form
    349.31/481.22 = 238.64/x
  3. Step 3: Cross multiply
    349.31x = 481.22 × 238.64
  4. Step 4: Simplify right side
    349.31x = 114,838.34
  5. Step 5: Solve for x
    x = 114,838.34/349.31
  6. Step 6: Final answer
    x = 328.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.