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Finding the Fourth Proportional to 391.70, 540.24 and 244.28

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Solution

The fourth proportional to 391.70, 540.24 and 244.28 is: 336.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.70 : 540.24 = 244.28 : x
  2. Step 2: Convert to fraction form
    391.70/540.24 = 244.28/x
  3. Step 3: Cross multiply
    391.70x = 540.24 × 244.28
  4. Step 4: Simplify right side
    391.70x = 131,969.83
  5. Step 5: Solve for x
    x = 131,969.83/391.70
  6. Step 6: Final answer
    x = 336.92

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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.