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Finding the Fourth Proportional to 238.72, 355.23 and 237.91

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Solution

The fourth proportional to 238.72, 355.23 and 237.91 is: 354.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.72 : 355.23 = 237.91 : x
  2. Step 2: Convert to fraction form
    238.72/355.23 = 237.91/x
  3. Step 3: Cross multiply
    238.72x = 355.23 × 237.91
  4. Step 4: Simplify right side
    238.72x = 84,512.77
  5. Step 5: Solve for x
    x = 84,512.77/238.72
  6. Step 6: Final answer
    x = 354.02

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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.