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Finding the Fourth Proportional to 285.06, 393.48 and 219.48

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Solution

The fourth proportional to 285.06, 393.48 and 219.48 is: 302.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.06 : 393.48 = 219.48 : x
  2. Step 2: Convert to fraction form
    285.06/393.48 = 219.48/x
  3. Step 3: Cross multiply
    285.06x = 393.48 × 219.48
  4. Step 4: Simplify right side
    285.06x = 86,360.99
  5. Step 5: Solve for x
    x = 86,360.99/285.06
  6. Step 6: Final answer
    x = 302.96

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