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Finding the Fourth Proportional to 197.70, 296.19 and 143.46

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Solution

The fourth proportional to 197.70, 296.19 and 143.46 is: 214.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.70 : 296.19 = 143.46 : x
  2. Step 2: Convert to fraction form
    197.70/296.19 = 143.46/x
  3. Step 3: Cross multiply
    197.70x = 296.19 × 143.46
  4. Step 4: Simplify right side
    197.70x = 42,491.42
  5. Step 5: Solve for x
    x = 42,491.42/197.70
  6. Step 6: Final answer
    x = 214.93

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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.