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Finding the Fourth Proportional to 391.82, 540.80 and 244.42

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Solution

The fourth proportional to 391.82, 540.80 and 244.42 is: 337.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.82 : 540.80 = 244.42 : x
  2. Step 2: Convert to fraction form
    391.82/540.80 = 244.42/x
  3. Step 3: Cross multiply
    391.82x = 540.80 × 244.42
  4. Step 4: Simplify right side
    391.82x = 132,184.01
  5. Step 5: Solve for x
    x = 132,184.01/391.82
  6. Step 6: Final answer
    x = 337.36

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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.