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Finding the Fourth Proportional to 717.24, 990.08 and 468.78

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Solution

The fourth proportional to 717.24, 990.08 and 468.78 is: 647.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.24 : 990.08 = 468.78 : x
  2. Step 2: Convert to fraction form
    717.24/990.08 = 468.78/x
  3. Step 3: Cross multiply
    717.24x = 990.08 × 468.78
  4. Step 4: Simplify right side
    717.24x = 464,129.70
  5. Step 5: Solve for x
    x = 464,129.70/717.24
  6. Step 6: Final answer
    x = 647.11

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