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Finding the Fourth Proportional to 203.11, 304.45 and 94.81

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Solution

The fourth proportional to 203.11, 304.45 and 94.81 is: 142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.11 : 304.45 = 94.81 : x
  2. Step 2: Convert to fraction form
    203.11/304.45 = 94.81/x
  3. Step 3: Cross multiply
    203.11x = 304.45 × 94.81
  4. Step 4: Simplify right side
    203.11x = 28,864.90
  5. Step 5: Solve for x
    x = 28,864.90/203.11
  6. Step 6: Final answer
    x = 142.11

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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.