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Finding the Fourth Proportional to 978.62, 1,464.41 and 850.12

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Solution

The fourth proportional to 978.62, 1,464.41 and 850.12 is: 1,272.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.62 : 1,464.41 = 850.12 : x
  2. Step 2: Convert to fraction form
    978.62/1,464.41 = 850.12/x
  3. Step 3: Cross multiply
    978.62x = 1,464.41 × 850.12
  4. Step 4: Simplify right side
    978.62x = 1,244,922.69
  5. Step 5: Solve for x
    x = 1,244,922.69/978.62
  6. Step 6: Final answer
    x = 1,272.13

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