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Finding the Fourth Proportional to 193.16, 289.14 and 138.14

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Solution

The fourth proportional to 193.16, 289.14 and 138.14 is: 206.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.16 : 289.14 = 138.14 : x
  2. Step 2: Convert to fraction form
    193.16/289.14 = 138.14/x
  3. Step 3: Cross multiply
    193.16x = 289.14 × 138.14
  4. Step 4: Simplify right side
    193.16x = 39,940.92
  5. Step 5: Solve for x
    x = 39,940.92/193.16
  6. Step 6: Final answer
    x = 206.77

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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.