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Finding the Fourth Proportional to 651.84, 978 and 267.12

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Solution

The fourth proportional to 651.84, 978 and 267.12 is: 400.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.84 : 978 = 267.12 : x
  2. Step 2: Convert to fraction form
    651.84/978 = 267.12/x
  3. Step 3: Cross multiply
    651.84x = 978 × 267.12
  4. Step 4: Simplify right side
    651.84x = 261,243.36
  5. Step 5: Solve for x
    x = 261,243.36/651.84
  6. Step 6: Final answer
    x = 400.78

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