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Finding the Fourth Proportional to 681.55, 1,022.48 and 194.59

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Solution

The fourth proportional to 681.55, 1,022.48 and 194.59 is: 291.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.55 : 1,022.48 = 194.59 : x
  2. Step 2: Convert to fraction form
    681.55/1,022.48 = 194.59/x
  3. Step 3: Cross multiply
    681.55x = 1,022.48 × 194.59
  4. Step 4: Simplify right side
    681.55x = 198,958.30
  5. Step 5: Solve for x
    x = 198,958.30/681.55
  6. Step 6: Final answer
    x = 291.92

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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.