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Finding the Fourth Proportional to 252.99, 379.30 and 79.55

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Solution

The fourth proportional to 252.99, 379.30 and 79.55 is: 119.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.99 : 379.30 = 79.55 : x
  2. Step 2: Convert to fraction form
    252.99/379.30 = 79.55/x
  3. Step 3: Cross multiply
    252.99x = 379.30 × 79.55
  4. Step 4: Simplify right side
    252.99x = 30,172.79
  5. Step 5: Solve for x
    x = 30,172.79/252.99
  6. Step 6: Final answer
    x = 119.26

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