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Finding the Fourth Proportional to 197.66, 296.15 and 120.44

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Solution

The fourth proportional to 197.66, 296.15 and 120.44 is: 180.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.66 : 296.15 = 120.44 : x
  2. Step 2: Convert to fraction form
    197.66/296.15 = 120.44/x
  3. Step 3: Cross multiply
    197.66x = 296.15 × 120.44
  4. Step 4: Simplify right side
    197.66x = 35,668.44
  5. Step 5: Solve for x
    x = 35,668.44/197.66
  6. Step 6: Final answer
    x = 180.45

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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.