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Finding the Fourth Proportional to 709.08, 978.13 and 446.64

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Solution

The fourth proportional to 709.08, 978.13 and 446.64 is: 616.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.08 : 978.13 = 446.64 : x
  2. Step 2: Convert to fraction form
    709.08/978.13 = 446.64/x
  3. Step 3: Cross multiply
    709.08x = 978.13 × 446.64
  4. Step 4: Simplify right side
    709.08x = 436,871.98
  5. Step 5: Solve for x
    x = 436,871.98/709.08
  6. Step 6: Final answer
    x = 616.11

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