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Finding the Fourth Proportional to 198.71, 297.66 and 117.31

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Solution

The fourth proportional to 198.71, 297.66 and 117.31 is: 175.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.71 : 297.66 = 117.31 : x
  2. Step 2: Convert to fraction form
    198.71/297.66 = 117.31/x
  3. Step 3: Cross multiply
    198.71x = 297.66 × 117.31
  4. Step 4: Simplify right side
    198.71x = 34,918.49
  5. Step 5: Solve for x
    x = 34,918.49/198.71
  6. Step 6: Final answer
    x = 175.73

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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.