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Finding the Fourth Proportional to 479.31, 661.41 and 282.84

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Solution

The fourth proportional to 479.31, 661.41 and 282.84 is: 390.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.31 : 661.41 = 282.84 : x
  2. Step 2: Convert to fraction form
    479.31/661.41 = 282.84/x
  3. Step 3: Cross multiply
    479.31x = 661.41 × 282.84
  4. Step 4: Simplify right side
    479.31x = 187,073.20
  5. Step 5: Solve for x
    x = 187,073.20/479.31
  6. Step 6: Final answer
    x = 390.30

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