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Finding the Fourth Proportional to 829.74, 1,244.88 and 396.90

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Solution

The fourth proportional to 829.74, 1,244.88 and 396.90 is: 595.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.74 : 1,244.88 = 396.90 : x
  2. Step 2: Convert to fraction form
    829.74/1,244.88 = 396.90/x
  3. Step 3: Cross multiply
    829.74x = 1,244.88 × 396.90
  4. Step 4: Simplify right side
    829.74x = 494,092.87
  5. Step 5: Solve for x
    x = 494,092.87/829.74
  6. Step 6: Final answer
    x = 595.48

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