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Finding the Fourth Proportional to 681.03, 932.75 and 641.12

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Solution

The fourth proportional to 681.03, 932.75 and 641.12 is: 878.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.03 : 932.75 = 641.12 : x
  2. Step 2: Convert to fraction form
    681.03/932.75 = 641.12/x
  3. Step 3: Cross multiply
    681.03x = 932.75 × 641.12
  4. Step 4: Simplify right side
    681.03x = 598,004.68
  5. Step 5: Solve for x
    x = 598,004.68/681.03
  6. Step 6: Final answer
    x = 878.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.