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Finding the Fourth Proportional to 978.01, 1,466.71 and 328.60

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Solution

The fourth proportional to 978.01, 1,466.71 and 328.60 is: 492.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.01 : 1,466.71 = 328.60 : x
  2. Step 2: Convert to fraction form
    978.01/1,466.71 = 328.60/x
  3. Step 3: Cross multiply
    978.01x = 1,466.71 × 328.60
  4. Step 4: Simplify right side
    978.01x = 481,954.39
  5. Step 5: Solve for x
    x = 481,954.39/978.01
  6. Step 6: Final answer
    x = 492.79

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