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Finding the Fourth Proportional to 391.60, 587.04 and 175.42

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Solution

The fourth proportional to 391.60, 587.04 and 175.42 is: 262.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.60 : 587.04 = 175.42 : x
  2. Step 2: Convert to fraction form
    391.60/587.04 = 175.42/x
  3. Step 3: Cross multiply
    391.60x = 587.04 × 175.42
  4. Step 4: Simplify right side
    391.60x = 102,978.56
  5. Step 5: Solve for x
    x = 102,978.56/391.60
  6. Step 6: Final answer
    x = 262.97

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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.