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Finding the Fourth Proportional to 644.04, 965.76 and 259

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Solution

The fourth proportional to 644.04, 965.76 and 259 is: 388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.04 : 965.76 = 259 : x
  2. Step 2: Convert to fraction form
    644.04/965.76 = 259/x
  3. Step 3: Cross multiply
    644.04x = 965.76 × 259
  4. Step 4: Simplify right side
    644.04x = 250,131.84
  5. Step 5: Solve for x
    x = 250,131.84/644.04
  6. Step 6: Final answer
    x = 388.38

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