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Finding the Fourth Proportional to 391.69, 540.30 and 244.27

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Solution

The fourth proportional to 391.69, 540.30 and 244.27 is: 336.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.69 : 540.30 = 244.27 : x
  2. Step 2: Convert to fraction form
    391.69/540.30 = 244.27/x
  3. Step 3: Cross multiply
    391.69x = 540.30 × 244.27
  4. Step 4: Simplify right side
    391.69x = 131,979.08
  5. Step 5: Solve for x
    x = 131,979.08/391.69
  6. Step 6: Final answer
    x = 336.95

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Double scale
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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.