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Finding the Fourth Proportional to 639.52, 958.92 and 305.59

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Solution

The fourth proportional to 639.52, 958.92 and 305.59 is: 458.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.52 : 958.92 = 305.59 : x
  2. Step 2: Convert to fraction form
    639.52/958.92 = 305.59/x
  3. Step 3: Cross multiply
    639.52x = 958.92 × 305.59
  4. Step 4: Simplify right side
    639.52x = 293,036.36
  5. Step 5: Solve for x
    x = 293,036.36/639.52
  6. Step 6: Final answer
    x = 458.21

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