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Finding the Fourth Proportional to 391.18, 539.93 and 241.86

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Solution

The fourth proportional to 391.18, 539.93 and 241.86 is: 333.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.18 : 539.93 = 241.86 : x
  2. Step 2: Convert to fraction form
    391.18/539.93 = 241.86/x
  3. Step 3: Cross multiply
    391.18x = 539.93 × 241.86
  4. Step 4: Simplify right side
    391.18x = 130,587.47
  5. Step 5: Solve for x
    x = 130,587.47/391.18
  6. Step 6: Final answer
    x = 333.83

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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.