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Finding the Fourth Proportional to 391.67, 540.57 and 234.33

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Solution

The fourth proportional to 391.67, 540.57 and 234.33 is: 323.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.67 : 540.57 = 234.33 : x
  2. Step 2: Convert to fraction form
    391.67/540.57 = 234.33/x
  3. Step 3: Cross multiply
    391.67x = 540.57 × 234.33
  4. Step 4: Simplify right side
    391.67x = 126,671.77
  5. Step 5: Solve for x
    x = 126,671.77/391.67
  6. Step 6: Final answer
    x = 323.42

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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.