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Finding the Fourth Proportional to 681.23, 1,021.69 and 194.27

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Solution

The fourth proportional to 681.23, 1,021.69 and 194.27 is: 291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.23 : 1,021.69 = 194.27 : x
  2. Step 2: Convert to fraction form
    681.23/1,021.69 = 194.27/x
  3. Step 3: Cross multiply
    681.23x = 1,021.69 × 194.27
  4. Step 4: Simplify right side
    681.23x = 198,483.72
  5. Step 5: Solve for x
    x = 198,483.72/681.23
  6. Step 6: Final answer
    x = 291.36

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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.