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Finding the Fourth Proportional to 641.72, 960.68 and 488.27

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Solution

The fourth proportional to 641.72, 960.68 and 488.27 is: 730.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.72 : 960.68 = 488.27 : x
  2. Step 2: Convert to fraction form
    641.72/960.68 = 488.27/x
  3. Step 3: Cross multiply
    641.72x = 960.68 × 488.27
  4. Step 4: Simplify right side
    641.72x = 469,067.64
  5. Step 5: Solve for x
    x = 469,067.64/641.72
  6. Step 6: Final answer
    x = 730.96

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