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Finding the Fourth Proportional to 680.88, 939.52 and 431.76

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Solution

The fourth proportional to 680.88, 939.52 and 431.76 is: 595.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.88 : 939.52 = 431.76 : x
  2. Step 2: Convert to fraction form
    680.88/939.52 = 431.76/x
  3. Step 3: Cross multiply
    680.88x = 939.52 × 431.76
  4. Step 4: Simplify right side
    680.88x = 405,647.16
  5. Step 5: Solve for x
    x = 405,647.16/680.88
  6. Step 6: Final answer
    x = 595.77

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