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Finding the Fourth Proportional to 286.19, 394.66 and 230.75

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Solution

The fourth proportional to 286.19, 394.66 and 230.75 is: 318.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.19 : 394.66 = 230.75 : x
  2. Step 2: Convert to fraction form
    286.19/394.66 = 230.75/x
  3. Step 3: Cross multiply
    286.19x = 394.66 × 230.75
  4. Step 4: Simplify right side
    286.19x = 91,067.80
  5. Step 5: Solve for x
    x = 91,067.80/286.19
  6. Step 6: Final answer
    x = 318.21

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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.