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Finding the Fourth Proportional to 237.15, 355.71 and 72.61

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Solution

The fourth proportional to 237.15, 355.71 and 72.61 is: 108.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.15 : 355.71 = 72.61 : x
  2. Step 2: Convert to fraction form
    237.15/355.71 = 72.61/x
  3. Step 3: Cross multiply
    237.15x = 355.71 × 72.61
  4. Step 4: Simplify right side
    237.15x = 25,827.73
  5. Step 5: Solve for x
    x = 25,827.73/237.15
  6. Step 6: Final answer
    x = 108.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.