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Finding the Fourth Proportional to 237.61, 356.19 and 91.31

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Solution

The fourth proportional to 237.61, 356.19 and 91.31 is: 136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.61 : 356.19 = 91.31 : x
  2. Step 2: Convert to fraction form
    237.61/356.19 = 91.31/x
  3. Step 3: Cross multiply
    237.61x = 356.19 × 91.31
  4. Step 4: Simplify right side
    237.61x = 32,524.60
  5. Step 5: Solve for x
    x = 32,524.60/237.61
  6. Step 6: Final answer
    x = 136.88

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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.