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Finding the Fourth Proportional to 386.33, 579.56 and 112.43

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Solution

The fourth proportional to 386.33, 579.56 and 112.43 is: 168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.33 : 579.56 = 112.43 : x
  2. Step 2: Convert to fraction form
    386.33/579.56 = 112.43/x
  3. Step 3: Cross multiply
    386.33x = 579.56 × 112.43
  4. Step 4: Simplify right side
    386.33x = 65,156.47
  5. Step 5: Solve for x
    x = 65,156.47/386.33
  6. Step 6: Final answer
    x = 168.66

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