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Finding the Fourth Proportional to 681.09, 940.02 and 386.29

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Solution

The fourth proportional to 681.09, 940.02 and 386.29 is: 533.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.09 : 940.02 = 386.29 : x
  2. Step 2: Convert to fraction form
    681.09/940.02 = 386.29/x
  3. Step 3: Cross multiply
    681.09x = 940.02 × 386.29
  4. Step 4: Simplify right side
    681.09x = 363,120.33
  5. Step 5: Solve for x
    x = 363,120.33/681.09
  6. Step 6: Final answer
    x = 533.15

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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.