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Finding the Fourth Proportional to 443.35, 664.80 and 260.80

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Solution

The fourth proportional to 443.35, 664.80 and 260.80 is: 391.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.35 : 664.80 = 260.80 : x
  2. Step 2: Convert to fraction form
    443.35/664.80 = 260.80/x
  3. Step 3: Cross multiply
    443.35x = 664.80 × 260.80
  4. Step 4: Simplify right side
    443.35x = 173,379.84
  5. Step 5: Solve for x
    x = 173,379.84/443.35
  6. Step 6: Final answer
    x = 391.07

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