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Finding the Fourth Proportional to 371.88, 511.98 and 328.20

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Solution

The fourth proportional to 371.88, 511.98 and 328.20 is: 451.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.88 : 511.98 = 328.20 : x
  2. Step 2: Convert to fraction form
    371.88/511.98 = 328.20/x
  3. Step 3: Cross multiply
    371.88x = 511.98 × 328.20
  4. Step 4: Simplify right side
    371.88x = 168,031.84
  5. Step 5: Solve for x
    x = 168,031.84/371.88
  6. Step 6: Final answer
    x = 451.84

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