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Finding the Fourth Proportional to 171.29, 257.24 and 164.21

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Solution

The fourth proportional to 171.29, 257.24 and 164.21 is: 246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.29 : 257.24 = 164.21 : x
  2. Step 2: Convert to fraction form
    171.29/257.24 = 164.21/x
  3. Step 3: Cross multiply
    171.29x = 257.24 × 164.21
  4. Step 4: Simplify right side
    171.29x = 42,240.50
  5. Step 5: Solve for x
    x = 42,240.50/171.29
  6. Step 6: Final answer
    x = 246.60

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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.