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Finding the Fourth Proportional to 652.43, 978.54 and 213.68

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Solution

The fourth proportional to 652.43, 978.54 and 213.68 is: 320.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.43 : 978.54 = 213.68 : x
  2. Step 2: Convert to fraction form
    652.43/978.54 = 213.68/x
  3. Step 3: Cross multiply
    652.43x = 978.54 × 213.68
  4. Step 4: Simplify right side
    652.43x = 209,091.77
  5. Step 5: Solve for x
    x = 209,091.77/652.43
  6. Step 6: Final answer
    x = 320.48

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