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Finding the Fourth Proportional to 474.91, 710.63 and 280.00

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Solution

The fourth proportional to 474.91, 710.63 and 280.00 is: 418.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.91 : 710.63 = 280.00 : x
  2. Step 2: Convert to fraction form
    474.91/710.63 = 280.00/x
  3. Step 3: Cross multiply
    474.91x = 710.63 × 280.00
  4. Step 4: Simplify right side
    474.91x = 198,974.15
  5. Step 5: Solve for x
    x = 198,974.15/474.91
  6. Step 6: Final answer
    x = 418.97

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