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Finding the Fourth Proportional to 662.88, 993.72 and 418.68

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Solution

The fourth proportional to 662.88, 993.72 and 418.68 is: 627.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.88 : 993.72 = 418.68 : x
  2. Step 2: Convert to fraction form
    662.88/993.72 = 418.68/x
  3. Step 3: Cross multiply
    662.88x = 993.72 × 418.68
  4. Step 4: Simplify right side
    662.88x = 416,050.69
  5. Step 5: Solve for x
    x = 416,050.69/662.88
  6. Step 6: Final answer
    x = 627.64

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