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Finding the Fourth Proportional to 639.75, 959.60 and 177.53

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Solution

The fourth proportional to 639.75, 959.60 and 177.53 is: 266.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.75 : 959.60 = 177.53 : x
  2. Step 2: Convert to fraction form
    639.75/959.60 = 177.53/x
  3. Step 3: Cross multiply
    639.75x = 959.60 × 177.53
  4. Step 4: Simplify right side
    639.75x = 170,352.10
  5. Step 5: Solve for x
    x = 170,352.10/639.75
  6. Step 6: Final answer
    x = 266.28

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