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Finding the Fourth Proportional to 286.75, 395.68 and 168.76

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Solution

The fourth proportional to 286.75, 395.68 and 168.76 is: 232.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.75 : 395.68 = 168.76 : x
  2. Step 2: Convert to fraction form
    286.75/395.68 = 168.76/x
  3. Step 3: Cross multiply
    286.75x = 395.68 × 168.76
  4. Step 4: Simplify right side
    286.75x = 66,772.13
  5. Step 5: Solve for x
    x = 66,772.13/286.75
  6. Step 6: Final answer
    x = 232.86

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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.