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Finding the Fourth Proportional to 391.73, 587.11 and 174.86

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Solution

The fourth proportional to 391.73, 587.11 and 174.86 is: 262.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.73 : 587.11 = 174.86 : x
  2. Step 2: Convert to fraction form
    391.73/587.11 = 174.86/x
  3. Step 3: Cross multiply
    391.73x = 587.11 × 174.86
  4. Step 4: Simplify right side
    391.73x = 102,662.05
  5. Step 5: Solve for x
    x = 102,662.05/391.73
  6. Step 6: Final answer
    x = 262.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.