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Finding the Fourth Proportional to 625.52, 938.21 and 393.68

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Solution

The fourth proportional to 625.52, 938.21 and 393.68 is: 590.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.52 : 938.21 = 393.68 : x
  2. Step 2: Convert to fraction form
    625.52/938.21 = 393.68/x
  3. Step 3: Cross multiply
    625.52x = 938.21 × 393.68
  4. Step 4: Simplify right side
    625.52x = 369,354.89
  5. Step 5: Solve for x
    x = 369,354.89/625.52
  6. Step 6: Final answer
    x = 590.47

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