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Finding the Fourth Proportional to 439.08, 657.36 and 342.96

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Solution

The fourth proportional to 439.08, 657.36 and 342.96 is: 513.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.08 : 657.36 = 342.96 : x
  2. Step 2: Convert to fraction form
    439.08/657.36 = 342.96/x
  3. Step 3: Cross multiply
    439.08x = 657.36 × 342.96
  4. Step 4: Simplify right side
    439.08x = 225,448.19
  5. Step 5: Solve for x
    x = 225,448.19/439.08
  6. Step 6: Final answer
    x = 513.46

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