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Finding the Fourth Proportional to 259.78, 388.94 and 195.70

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Solution

The fourth proportional to 259.78, 388.94 and 195.70 is: 293.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.78 : 388.94 = 195.70 : x
  2. Step 2: Convert to fraction form
    259.78/388.94 = 195.70/x
  3. Step 3: Cross multiply
    259.78x = 388.94 × 195.70
  4. Step 4: Simplify right side
    259.78x = 76,116.05
  5. Step 5: Solve for x
    x = 76,116.05/259.78
  6. Step 6: Final answer
    x = 293.00

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