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Finding the Fourth Proportional to 196.28, 270.90 and 118.70

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Solution

The fourth proportional to 196.28, 270.90 and 118.70 is: 163.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.28 : 270.90 = 118.70 : x
  2. Step 2: Convert to fraction form
    196.28/270.90 = 118.70/x
  3. Step 3: Cross multiply
    196.28x = 270.90 × 118.70
  4. Step 4: Simplify right side
    196.28x = 32,155.83
  5. Step 5: Solve for x
    x = 32,155.83/196.28
  6. Step 6: Final answer
    x = 163.83

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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.