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Finding the Fourth Proportional to 637.88, 956.21 and 393.66

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Solution

The fourth proportional to 637.88, 956.21 and 393.66 is: 590.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.88 : 956.21 = 393.66 : x
  2. Step 2: Convert to fraction form
    637.88/956.21 = 393.66/x
  3. Step 3: Cross multiply
    637.88x = 956.21 × 393.66
  4. Step 4: Simplify right side
    637.88x = 376,419.66
  5. Step 5: Solve for x
    x = 376,419.66/637.88
  6. Step 6: Final answer
    x = 590.12

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