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Finding the Fourth Proportional to 238.48, 330.91 and 235.36

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Solution

The fourth proportional to 238.48, 330.91 and 235.36 is: 326.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.48 : 330.91 = 235.36 : x
  2. Step 2: Convert to fraction form
    238.48/330.91 = 235.36/x
  3. Step 3: Cross multiply
    238.48x = 330.91 × 235.36
  4. Step 4: Simplify right side
    238.48x = 77,882.98
  5. Step 5: Solve for x
    x = 77,882.98/238.48
  6. Step 6: Final answer
    x = 326.58

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.