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Finding the Fourth Proportional to 171.48, 257.22 and 159.90

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Solution

The fourth proportional to 171.48, 257.22 and 159.90 is: 239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.48 : 257.22 = 159.90 : x
  2. Step 2: Convert to fraction form
    171.48/257.22 = 159.90/x
  3. Step 3: Cross multiply
    171.48x = 257.22 × 159.90
  4. Step 4: Simplify right side
    171.48x = 41,129.48
  5. Step 5: Solve for x
    x = 41,129.48/171.48
  6. Step 6: Final answer
    x = 239.85

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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.