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Finding the Fourth Proportional to 238.66, 355.13 and 237.85

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Solution

The fourth proportional to 238.66, 355.13 and 237.85 is: 353.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.66 : 355.13 = 237.85 : x
  2. Step 2: Convert to fraction form
    238.66/355.13 = 237.85/x
  3. Step 3: Cross multiply
    238.66x = 355.13 × 237.85
  4. Step 4: Simplify right side
    238.66x = 84,468.12
  5. Step 5: Solve for x
    x = 84,468.12/238.66
  6. Step 6: Final answer
    x = 353.93

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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.