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Finding the Fourth Proportional to 238.72, 355.25 and 237.64

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Solution

The fourth proportional to 238.72, 355.25 and 237.64 is: 353.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.72 : 355.25 = 237.64 : x
  2. Step 2: Convert to fraction form
    238.72/355.25 = 237.64/x
  3. Step 3: Cross multiply
    238.72x = 355.25 × 237.64
  4. Step 4: Simplify right side
    238.72x = 84,421.61
  5. Step 5: Solve for x
    x = 84,421.61/238.72
  6. Step 6: Final answer
    x = 353.64

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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.