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Finding the Fourth Proportional to 724.03, 1,085.75 and 261.64

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Solution

The fourth proportional to 724.03, 1,085.75 and 261.64 is: 392.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.03 : 1,085.75 = 261.64 : x
  2. Step 2: Convert to fraction form
    724.03/1,085.75 = 261.64/x
  3. Step 3: Cross multiply
    724.03x = 1,085.75 × 261.64
  4. Step 4: Simplify right side
    724.03x = 284,074.32
  5. Step 5: Solve for x
    x = 284,074.32/724.03
  6. Step 6: Final answer
    x = 392.35

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