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Finding the Fourth Proportional to 170.39, 254.21 and 169.17

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Solution

The fourth proportional to 170.39, 254.21 and 169.17 is: 252.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.39 : 254.21 = 169.17 : x
  2. Step 2: Convert to fraction form
    170.39/254.21 = 169.17/x
  3. Step 3: Cross multiply
    170.39x = 254.21 × 169.17
  4. Step 4: Simplify right side
    170.39x = 43,003.86
  5. Step 5: Solve for x
    x = 43,003.86/170.39
  6. Step 6: Final answer
    x = 252.39

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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.