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Finding the Fourth Proportional to 203.22, 280.26 and 140.94

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Solution

The fourth proportional to 203.22, 280.26 and 140.94 is: 194.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.22 : 280.26 = 140.94 : x
  2. Step 2: Convert to fraction form
    203.22/280.26 = 140.94/x
  3. Step 3: Cross multiply
    203.22x = 280.26 × 140.94
  4. Step 4: Simplify right side
    203.22x = 39,499.84
  5. Step 5: Solve for x
    x = 39,499.84/203.22
  6. Step 6: Final answer
    x = 194.37

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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.