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Finding the Fourth Proportional to 311.24, 429.52 and 171.37

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Solution

The fourth proportional to 311.24, 429.52 and 171.37 is: 236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.24 : 429.52 = 171.37 : x
  2. Step 2: Convert to fraction form
    311.24/429.52 = 171.37/x
  3. Step 3: Cross multiply
    311.24x = 429.52 × 171.37
  4. Step 4: Simplify right side
    311.24x = 73,605.34
  5. Step 5: Solve for x
    x = 73,605.34/311.24
  6. Step 6: Final answer
    x = 236.49

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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.