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Finding the Fourth Proportional to 681.39, 940.18 and 401.44

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Solution

The fourth proportional to 681.39, 940.18 and 401.44 is: 553.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.39 : 940.18 = 401.44 : x
  2. Step 2: Convert to fraction form
    681.39/940.18 = 401.44/x
  3. Step 3: Cross multiply
    681.39x = 940.18 × 401.44
  4. Step 4: Simplify right side
    681.39x = 377,425.86
  5. Step 5: Solve for x
    x = 377,425.86/681.39
  6. Step 6: Final answer
    x = 553.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.