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Finding the Fourth Proportional to 286.31, 394.79 and 249.36

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Solution

The fourth proportional to 286.31, 394.79 and 249.36 is: 343.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.31 : 394.79 = 249.36 : x
  2. Step 2: Convert to fraction form
    286.31/394.79 = 249.36/x
  3. Step 3: Cross multiply
    286.31x = 394.79 × 249.36
  4. Step 4: Simplify right side
    286.31x = 98,443.59
  5. Step 5: Solve for x
    x = 98,443.59/286.31
  6. Step 6: Final answer
    x = 343.84

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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.