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Finding the Fourth Proportional to 286.39, 395.17 and 168.40

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Solution

The fourth proportional to 286.39, 395.17 and 168.40 is: 232.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.39 : 395.17 = 168.40 : x
  2. Step 2: Convert to fraction form
    286.39/395.17 = 168.40/x
  3. Step 3: Cross multiply
    286.39x = 395.17 × 168.40
  4. Step 4: Simplify right side
    286.39x = 66,546.63
  5. Step 5: Solve for x
    x = 66,546.63/286.39
  6. Step 6: Final answer
    x = 232.36

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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.