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Finding the Fourth Proportional to 631.38, 946.97 and 198.44

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Solution

The fourth proportional to 631.38, 946.97 and 198.44 is: 297.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.38 : 946.97 = 198.44 : x
  2. Step 2: Convert to fraction form
    631.38/946.97 = 198.44/x
  3. Step 3: Cross multiply
    631.38x = 946.97 × 198.44
  4. Step 4: Simplify right side
    631.38x = 187,916.73
  5. Step 5: Solve for x
    x = 187,916.73/631.38
  6. Step 6: Final answer
    x = 297.63

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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.