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Finding the Fourth Proportional to 681.26, 940.16 and 382.58

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Solution

The fourth proportional to 681.26, 940.16 and 382.58 is: 527.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.26 : 940.16 = 382.58 : x
  2. Step 2: Convert to fraction form
    681.26/940.16 = 382.58/x
  3. Step 3: Cross multiply
    681.26x = 940.16 × 382.58
  4. Step 4: Simplify right side
    681.26x = 359,682.72
  5. Step 5: Solve for x
    x = 359,682.72/681.26
  6. Step 6: Final answer
    x = 527.96

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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.