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Finding the Fourth Proportional to 772.12, 1,157.94 and 259

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Solution

The fourth proportional to 772.12, 1,157.94 and 259 is: 388.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.12 : 1,157.94 = 259 : x
  2. Step 2: Convert to fraction form
    772.12/1,157.94 = 259/x
  3. Step 3: Cross multiply
    772.12x = 1,157.94 × 259
  4. Step 4: Simplify right side
    772.12x = 299,906.46
  5. Step 5: Solve for x
    x = 299,906.46/772.12
  6. Step 6: Final answer
    x = 388.42

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