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Finding the Fourth Proportional to 651.72, 978 and 286.56

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Solution

The fourth proportional to 651.72, 978 and 286.56 is: 430.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.72 : 978 = 286.56 : x
  2. Step 2: Convert to fraction form
    651.72/978 = 286.56/x
  3. Step 3: Cross multiply
    651.72x = 978 × 286.56
  4. Step 4: Simplify right side
    651.72x = 280,255.68
  5. Step 5: Solve for x
    x = 280,255.68/651.72
  6. Step 6: Final answer
    x = 430.02

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