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Finding the Fourth Proportional to 448.11, 618.36 and 261.65

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Solution

The fourth proportional to 448.11, 618.36 and 261.65 is: 361.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.11 : 618.36 = 261.65 : x
  2. Step 2: Convert to fraction form
    448.11/618.36 = 261.65/x
  3. Step 3: Cross multiply
    448.11x = 618.36 × 261.65
  4. Step 4: Simplify right side
    448.11x = 161,793.89
  5. Step 5: Solve for x
    x = 161,793.89/448.11
  6. Step 6: Final answer
    x = 361.06

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