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Finding the Fourth Proportional to 651.70, 978 and 343.54

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Solution

The fourth proportional to 651.70, 978 and 343.54 is: 515.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.70 : 978 = 343.54 : x
  2. Step 2: Convert to fraction form
    651.70/978 = 343.54/x
  3. Step 3: Cross multiply
    651.70x = 978 × 343.54
  4. Step 4: Simplify right side
    651.70x = 335,982.12
  5. Step 5: Solve for x
    x = 335,982.12/651.70
  6. Step 6: Final answer
    x = 515.55

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