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Finding the Fourth Proportional to 978, 1,350.24 and 629.30

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Solution

The fourth proportional to 978, 1,350.24 and 629.30 is: 868.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    978 : 1,350.24 = 629.30 : x
  2. Step 2: Convert to fraction form
    978/1,350.24 = 629.30/x
  3. Step 3: Cross multiply
    978x = 1,350.24 × 629.30
  4. Step 4: Simplify right side
    978x = 849,706.03
  5. Step 5: Solve for x
    x = 849,706.03/978
  6. Step 6: Final answer
    x = 868.82

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