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Finding the Fourth Proportional to 195.21, 269.40 and 112.28

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Solution

The fourth proportional to 195.21, 269.40 and 112.28 is: 154.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.21 : 269.40 = 112.28 : x
  2. Step 2: Convert to fraction form
    195.21/269.40 = 112.28/x
  3. Step 3: Cross multiply
    195.21x = 269.40 × 112.28
  4. Step 4: Simplify right side
    195.21x = 30,248.23
  5. Step 5: Solve for x
    x = 30,248.23/195.21
  6. Step 6: Final answer
    x = 154.95

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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.