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Finding the Fourth Proportional to 391.86, 540.63 and 226.02

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Solution

The fourth proportional to 391.86, 540.63 and 226.02 is: 311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.86 : 540.63 = 226.02 : x
  2. Step 2: Convert to fraction form
    391.86/540.63 = 226.02/x
  3. Step 3: Cross multiply
    391.86x = 540.63 × 226.02
  4. Step 4: Simplify right side
    391.86x = 122,193.19
  5. Step 5: Solve for x
    x = 122,193.19/391.86
  6. Step 6: Final answer
    x = 311.83

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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.