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Finding the Fourth Proportional to 386.16, 579.44 and 203.57

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Solution

The fourth proportional to 386.16, 579.44 and 203.57 is: 305.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.16 : 579.44 = 203.57 : x
  2. Step 2: Convert to fraction form
    386.16/579.44 = 203.57/x
  3. Step 3: Cross multiply
    386.16x = 579.44 × 203.57
  4. Step 4: Simplify right side
    386.16x = 117,956.60
  5. Step 5: Solve for x
    x = 117,956.60/386.16
  6. Step 6: Final answer
    x = 305.46

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