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Finding the Fourth Proportional to 681.41, 940.35 and 386.69

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Solution

The fourth proportional to 681.41, 940.35 and 386.69 is: 533.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.41 : 940.35 = 386.69 : x
  2. Step 2: Convert to fraction form
    681.41/940.35 = 386.69/x
  3. Step 3: Cross multiply
    681.41x = 940.35 × 386.69
  4. Step 4: Simplify right side
    681.41x = 363,620.69
  5. Step 5: Solve for x
    x = 363,620.69/681.41
  6. Step 6: Final answer
    x = 533.63

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