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Finding the Fourth Proportional to 218.90, 301.97 and 203.27

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Solution

The fourth proportional to 218.90, 301.97 and 203.27 is: 280.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.90 : 301.97 = 203.27 : x
  2. Step 2: Convert to fraction form
    218.90/301.97 = 203.27/x
  3. Step 3: Cross multiply
    218.90x = 301.97 × 203.27
  4. Step 4: Simplify right side
    218.90x = 61,380.44
  5. Step 5: Solve for x
    x = 61,380.44/218.90
  6. Step 6: Final answer
    x = 280.40

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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.