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Finding the Fourth Proportional to 478.80, 717.48 and 262.08

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Solution

The fourth proportional to 478.80, 717.48 and 262.08 is: 392.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.80 : 717.48 = 262.08 : x
  2. Step 2: Convert to fraction form
    478.80/717.48 = 262.08/x
  3. Step 3: Cross multiply
    478.80x = 717.48 × 262.08
  4. Step 4: Simplify right side
    478.80x = 188,037.16
  5. Step 5: Solve for x
    x = 188,037.16/478.80
  6. Step 6: Final answer
    x = 392.73

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