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Finding the Fourth Proportional to 391.75, 540.79 and 244.49

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Solution

The fourth proportional to 391.75, 540.79 and 244.49 is: 337.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.75 : 540.79 = 244.49 : x
  2. Step 2: Convert to fraction form
    391.75/540.79 = 244.49/x
  3. Step 3: Cross multiply
    391.75x = 540.79 × 244.49
  4. Step 4: Simplify right side
    391.75x = 132,214.43
  5. Step 5: Solve for x
    x = 132,214.43/391.75
  6. Step 6: Final answer
    x = 337.50

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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.