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Finding the Fourth Proportional to 195.50, 269.74 and 154.05

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Solution

The fourth proportional to 195.50, 269.74 and 154.05 is: 212.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.50 : 269.74 = 154.05 : x
  2. Step 2: Convert to fraction form
    195.50/269.74 = 154.05/x
  3. Step 3: Cross multiply
    195.50x = 269.74 × 154.05
  4. Step 4: Simplify right side
    195.50x = 41,553.45
  5. Step 5: Solve for x
    x = 41,553.45/195.50
  6. Step 6: Final answer
    x = 212.55

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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.