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Finding the Fourth Proportional to 286.83, 395.57 and 203.90

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Solution

The fourth proportional to 286.83, 395.57 and 203.90 is: 281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.83 : 395.57 = 203.90 : x
  2. Step 2: Convert to fraction form
    286.83/395.57 = 203.90/x
  3. Step 3: Cross multiply
    286.83x = 395.57 × 203.90
  4. Step 4: Simplify right side
    286.83x = 80,655.25
  5. Step 5: Solve for x
    x = 80,655.25/286.83
  6. Step 6: Final answer
    x = 281.20

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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.