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Finding the Fourth Proportional to 171.24, 235.90 and 165.32

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Solution

The fourth proportional to 171.24, 235.90 and 165.32 is: 227.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.24 : 235.90 = 165.32 : x
  2. Step 2: Convert to fraction form
    171.24/235.90 = 165.32/x
  3. Step 3: Cross multiply
    171.24x = 235.90 × 165.32
  4. Step 4: Simplify right side
    171.24x = 38,998.99
  5. Step 5: Solve for x
    x = 38,998.99/171.24
  6. Step 6: Final answer
    x = 227.74

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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.