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Finding the Fourth Proportional to 439.85, 607.19 and 274.17

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Solution

The fourth proportional to 439.85, 607.19 and 274.17 is: 378.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.85 : 607.19 = 274.17 : x
  2. Step 2: Convert to fraction form
    439.85/607.19 = 274.17/x
  3. Step 3: Cross multiply
    439.85x = 607.19 × 274.17
  4. Step 4: Simplify right side
    439.85x = 166,471.91
  5. Step 5: Solve for x
    x = 166,471.91/439.85
  6. Step 6: Final answer
    x = 378.48

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