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Finding the Fourth Proportional to 202.72, 279.69 and 140.44

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Solution

The fourth proportional to 202.72, 279.69 and 140.44 is: 193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.72 : 279.69 = 140.44 : x
  2. Step 2: Convert to fraction form
    202.72/279.69 = 140.44/x
  3. Step 3: Cross multiply
    202.72x = 279.69 × 140.44
  4. Step 4: Simplify right side
    202.72x = 39,279.66
  5. Step 5: Solve for x
    x = 39,279.66/202.72
  6. Step 6: Final answer
    x = 193.76

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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.