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Finding the Fourth Proportional to 681.97, 1,022.79 and 194.98

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Solution

The fourth proportional to 681.97, 1,022.79 and 194.98 is: 292.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.97 : 1,022.79 = 194.98 : x
  2. Step 2: Convert to fraction form
    681.97/1,022.79 = 194.98/x
  3. Step 3: Cross multiply
    681.97x = 1,022.79 × 194.98
  4. Step 4: Simplify right side
    681.97x = 199,423.59
  5. Step 5: Solve for x
    x = 199,423.59/681.97
  6. Step 6: Final answer
    x = 292.42

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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.