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Finding the Fourth Proportional to 286.94, 395.41 and 203.90

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Solution

The fourth proportional to 286.94, 395.41 and 203.90 is: 280.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.94 : 395.41 = 203.90 : x
  2. Step 2: Convert to fraction form
    286.94/395.41 = 203.90/x
  3. Step 3: Cross multiply
    286.94x = 395.41 × 203.90
  4. Step 4: Simplify right side
    286.94x = 80,623.65
  5. Step 5: Solve for x
    x = 80,623.65/286.94
  6. Step 6: Final answer
    x = 280.98

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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.