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Finding the Fourth Proportional to 231.21, 318.47 and 175.41

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Solution

The fourth proportional to 231.21, 318.47 and 175.41 is: 241.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.21 : 318.47 = 175.41 : x
  2. Step 2: Convert to fraction form
    231.21/318.47 = 175.41/x
  3. Step 3: Cross multiply
    231.21x = 318.47 × 175.41
  4. Step 4: Simplify right side
    231.21x = 55,861.95
  5. Step 5: Solve for x
    x = 55,861.95/231.21
  6. Step 6: Final answer
    x = 241.61

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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.