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Finding the Fourth Proportional to 681.21, 940.17 and 401.46

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Solution

The fourth proportional to 681.21, 940.17 and 401.46 is: 554.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.21 : 940.17 = 401.46 : x
  2. Step 2: Convert to fraction form
    681.21/940.17 = 401.46/x
  3. Step 3: Cross multiply
    681.21x = 940.17 × 401.46
  4. Step 4: Simplify right side
    681.21x = 377,440.65
  5. Step 5: Solve for x
    x = 377,440.65/681.21
  6. Step 6: Final answer
    x = 554.07

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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.