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Finding the Fourth Proportional to 681.54, 1,022.37 and 194.61

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Solution

The fourth proportional to 681.54, 1,022.37 and 194.61 is: 291.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.54 : 1,022.37 = 194.61 : x
  2. Step 2: Convert to fraction form
    681.54/1,022.37 = 194.61/x
  3. Step 3: Cross multiply
    681.54x = 1,022.37 × 194.61
  4. Step 4: Simplify right side
    681.54x = 198,963.43
  5. Step 5: Solve for x
    x = 198,963.43/681.54
  6. Step 6: Final answer
    x = 291.93

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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.