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Finding the Fourth Proportional to 202.75, 304.12 and 121.61

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Solution

The fourth proportional to 202.75, 304.12 and 121.61 is: 182.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.75 : 304.12 = 121.61 : x
  2. Step 2: Convert to fraction form
    202.75/304.12 = 121.61/x
  3. Step 3: Cross multiply
    202.75x = 304.12 × 121.61
  4. Step 4: Simplify right side
    202.75x = 36,984.03
  5. Step 5: Solve for x
    x = 36,984.03/202.75
  6. Step 6: Final answer
    x = 182.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.