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Finding the Fourth Proportional to 391.48, 540.42 and 244.24

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Solution

The fourth proportional to 391.48, 540.42 and 244.24 is: 337.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.48 : 540.42 = 244.24 : x
  2. Step 2: Convert to fraction form
    391.48/540.42 = 244.24/x
  3. Step 3: Cross multiply
    391.48x = 540.42 × 244.24
  4. Step 4: Simplify right side
    391.48x = 131,992.18
  5. Step 5: Solve for x
    x = 131,992.18/391.48
  6. Step 6: Final answer
    x = 337.16

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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.