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Finding the Fourth Proportional to 202.62, 279.81 and 140.61

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Solution

The fourth proportional to 202.62, 279.81 and 140.61 is: 194.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.62 : 279.81 = 140.61 : x
  2. Step 2: Convert to fraction form
    202.62/279.81 = 140.61/x
  3. Step 3: Cross multiply
    202.62x = 279.81 × 140.61
  4. Step 4: Simplify right side
    202.62x = 39,344.08
  5. Step 5: Solve for x
    x = 39,344.08/202.62
  6. Step 6: Final answer
    x = 194.18

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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.