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Finding the Fourth Proportional to 197.66, 296.22 and 143.54

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Solution

The fourth proportional to 197.66, 296.22 and 143.54 is: 215.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.66 : 296.22 = 143.54 : x
  2. Step 2: Convert to fraction form
    197.66/296.22 = 143.54/x
  3. Step 3: Cross multiply
    197.66x = 296.22 × 143.54
  4. Step 4: Simplify right side
    197.66x = 42,519.42
  5. Step 5: Solve for x
    x = 42,519.42/197.66
  6. Step 6: Final answer
    x = 215.11

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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.