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Finding the Fourth Proportional to 978.41, 1,466.63 and 613.46

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Solution

The fourth proportional to 978.41, 1,466.63 and 613.46 is: 919.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.41 : 1,466.63 = 613.46 : x
  2. Step 2: Convert to fraction form
    978.41/1,466.63 = 613.46/x
  3. Step 3: Cross multiply
    978.41x = 1,466.63 × 613.46
  4. Step 4: Simplify right side
    978.41x = 899,709.97
  5. Step 5: Solve for x
    x = 899,709.97/978.41
  6. Step 6: Final answer
    x = 919.56

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