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Finding the Fourth Proportional to 447.07, 670.39 and 138.93

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Solution

The fourth proportional to 447.07, 670.39 and 138.93 is: 208.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.07 : 670.39 = 138.93 : x
  2. Step 2: Convert to fraction form
    447.07/670.39 = 138.93/x
  3. Step 3: Cross multiply
    447.07x = 670.39 × 138.93
  4. Step 4: Simplify right side
    447.07x = 93,134.94
  5. Step 5: Solve for x
    x = 93,134.94/447.07
  6. Step 6: Final answer
    x = 208.32

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