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Finding the Fourth Proportional to 195.71, 269.70 and 154.31

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Solution

The fourth proportional to 195.71, 269.70 and 154.31 is: 212.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.71 : 269.70 = 154.31 : x
  2. Step 2: Convert to fraction form
    195.71/269.70 = 154.31/x
  3. Step 3: Cross multiply
    195.71x = 269.70 × 154.31
  4. Step 4: Simplify right side
    195.71x = 41,617.41
  5. Step 5: Solve for x
    x = 41,617.41/195.71
  6. Step 6: Final answer
    x = 212.65

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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.