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Finding the Fourth Proportional to 200.21, 300.49 and 107.73

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Solution

The fourth proportional to 200.21, 300.49 and 107.73 is: 161.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.21 : 300.49 = 107.73 : x
  2. Step 2: Convert to fraction form
    200.21/300.49 = 107.73/x
  3. Step 3: Cross multiply
    200.21x = 300.49 × 107.73
  4. Step 4: Simplify right side
    200.21x = 32,371.79
  5. Step 5: Solve for x
    x = 32,371.79/200.21
  6. Step 6: Final answer
    x = 161.69

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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.