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Finding the Fourth Proportional to 978.09, 1,466.69 and 328.38

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Solution

The fourth proportional to 978.09, 1,466.69 and 328.38 is: 492.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.09 : 1,466.69 = 328.38 : x
  2. Step 2: Convert to fraction form
    978.09/1,466.69 = 328.38/x
  3. Step 3: Cross multiply
    978.09x = 1,466.69 × 328.38
  4. Step 4: Simplify right side
    978.09x = 481,630.02
  5. Step 5: Solve for x
    x = 481,630.02/978.09
  6. Step 6: Final answer
    x = 492.42

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