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Finding the Fourth Proportional to 681.53, 940.38 and 382.73

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Solution

The fourth proportional to 681.53, 940.38 and 382.73 is: 528.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.53 : 940.38 = 382.73 : x
  2. Step 2: Convert to fraction form
    681.53/940.38 = 382.73/x
  3. Step 3: Cross multiply
    681.53x = 940.38 × 382.73
  4. Step 4: Simplify right side
    681.53x = 359,911.64
  5. Step 5: Solve for x
    x = 359,911.64/681.53
  6. Step 6: Final answer
    x = 528.09

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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.