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Finding the Fourth Proportional to 193.20, 266.22 and 149.40

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Solution

The fourth proportional to 193.20, 266.22 and 149.40 is: 205.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.20 : 266.22 = 149.40 : x
  2. Step 2: Convert to fraction form
    193.20/266.22 = 149.40/x
  3. Step 3: Cross multiply
    193.20x = 266.22 × 149.40
  4. Step 4: Simplify right side
    193.20x = 39,773.27
  5. Step 5: Solve for x
    x = 39,773.27/193.20
  6. Step 6: Final answer
    x = 205.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.