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Finding the Fourth Proportional to 193.27, 289.44 and 138.91

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Solution

The fourth proportional to 193.27, 289.44 and 138.91 is: 208.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.27 : 289.44 = 138.91 : x
  2. Step 2: Convert to fraction form
    193.27/289.44 = 138.91/x
  3. Step 3: Cross multiply
    193.27x = 289.44 × 138.91
  4. Step 4: Simplify right side
    193.27x = 40,206.11
  5. Step 5: Solve for x
    x = 40,206.11/193.27
  6. Step 6: Final answer
    x = 208.03

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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.