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Finding the Fourth Proportional to 203.67, 304.75 and 121.11

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Solution

The fourth proportional to 203.67, 304.75 and 121.11 is: 181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.67 : 304.75 = 121.11 : x
  2. Step 2: Convert to fraction form
    203.67/304.75 = 121.11/x
  3. Step 3: Cross multiply
    203.67x = 304.75 × 121.11
  4. Step 4: Simplify right side
    203.67x = 36,906.14
  5. Step 5: Solve for x
    x = 36,906.14/203.67
  6. Step 6: Final answer
    x = 181.21

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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.