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Finding the Fourth Proportional to 201.38, 301.89 and 105.17

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Solution

The fourth proportional to 201.38, 301.89 and 105.17 is: 157.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.38 : 301.89 = 105.17 : x
  2. Step 2: Convert to fraction form
    201.38/301.89 = 105.17/x
  3. Step 3: Cross multiply
    201.38x = 301.89 × 105.17
  4. Step 4: Simplify right side
    201.38x = 31,749.77
  5. Step 5: Solve for x
    x = 31,749.77/201.38
  6. Step 6: Final answer
    x = 157.66

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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.