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Finding the Fourth Proportional to 391.75, 540.58 and 234.37

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Solution

The fourth proportional to 391.75, 540.58 and 234.37 is: 323.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.75 : 540.58 = 234.37 : x
  2. Step 2: Convert to fraction form
    391.75/540.58 = 234.37/x
  3. Step 3: Cross multiply
    391.75x = 540.58 × 234.37
  4. Step 4: Simplify right side
    391.75x = 126,695.73
  5. Step 5: Solve for x
    x = 126,695.73/391.75
  6. Step 6: Final answer
    x = 323.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.