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Finding the Fourth Proportional to 200.91, 301.22 and 103.31

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Solution

The fourth proportional to 200.91, 301.22 and 103.31 is: 154.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.91 : 301.22 = 103.31 : x
  2. Step 2: Convert to fraction form
    200.91/301.22 = 103.31/x
  3. Step 3: Cross multiply
    200.91x = 301.22 × 103.31
  4. Step 4: Simplify right side
    200.91x = 31,118.53
  5. Step 5: Solve for x
    x = 31,118.53/200.91
  6. Step 6: Final answer
    x = 154.89

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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.