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Finding the Fourth Proportional to 260.09, 390.17 and 97.81

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Solution

The fourth proportional to 260.09, 390.17 and 97.81 is: 146.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.09 : 390.17 = 97.81 : x
  2. Step 2: Convert to fraction form
    260.09/390.17 = 97.81/x
  3. Step 3: Cross multiply
    260.09x = 390.17 × 97.81
  4. Step 4: Simplify right side
    260.09x = 38,161.25
  5. Step 5: Solve for x
    x = 38,161.25/260.09
  6. Step 6: Final answer
    x = 146.73

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