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Finding the Fourth Proportional to 626.48, 939 and 261.08

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Solution

The fourth proportional to 626.48, 939 and 261.08 is: 391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.48 : 939 = 261.08 : x
  2. Step 2: Convert to fraction form
    626.48/939 = 261.08/x
  3. Step 3: Cross multiply
    626.48x = 939 × 261.08
  4. Step 4: Simplify right side
    626.48x = 245,154.12
  5. Step 5: Solve for x
    x = 245,154.12/626.48
  6. Step 6: Final answer
    x = 391.32

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