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Finding the Fourth Proportional to 391.60, 540.21 and 244.27

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Solution

The fourth proportional to 391.60, 540.21 and 244.27 is: 336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.60 : 540.21 = 244.27 : x
  2. Step 2: Convert to fraction form
    391.60/540.21 = 244.27/x
  3. Step 3: Cross multiply
    391.60x = 540.21 × 244.27
  4. Step 4: Simplify right side
    391.60x = 131,957.10
  5. Step 5: Solve for x
    x = 131,957.10/391.60
  6. Step 6: Final answer
    x = 336.97

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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.