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Finding the Fourth Proportional to 708.78, 978 and 446.88

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Solution

The fourth proportional to 708.78, 978 and 446.88 is: 616.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.78 : 978 = 446.88 : x
  2. Step 2: Convert to fraction form
    708.78/978 = 446.88/x
  3. Step 3: Cross multiply
    708.78x = 978 × 446.88
  4. Step 4: Simplify right side
    708.78x = 437,048.64
  5. Step 5: Solve for x
    x = 437,048.64/708.78
  6. Step 6: Final answer
    x = 616.62

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Why These Related Problems?

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