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Finding the Fourth Proportional to 286.11, 394.92 and 203.67

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Solution

The fourth proportional to 286.11, 394.92 and 203.67 is: 281.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.11 : 394.92 = 203.67 : x
  2. Step 2: Convert to fraction form
    286.11/394.92 = 203.67/x
  3. Step 3: Cross multiply
    286.11x = 394.92 × 203.67
  4. Step 4: Simplify right side
    286.11x = 80,433.36
  5. Step 5: Solve for x
    x = 80,433.36/286.11
  6. Step 6: Final answer
    x = 281.13

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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.