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Finding the Fourth Proportional to 171.39, 255.70 and 170.17

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Solution

The fourth proportional to 171.39, 255.70 and 170.17 is: 253.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.39 : 255.70 = 170.17 : x
  2. Step 2: Convert to fraction form
    171.39/255.70 = 170.17/x
  3. Step 3: Cross multiply
    171.39x = 255.70 × 170.17
  4. Step 4: Simplify right side
    171.39x = 43,512.47
  5. Step 5: Solve for x
    x = 43,512.47/171.39
  6. Step 6: Final answer
    x = 253.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.