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Finding the Fourth Proportional to 540.81, 811.08 and 266.64

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Solution

The fourth proportional to 540.81, 811.08 and 266.64 is: 399.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.81 : 811.08 = 266.64 : x
  2. Step 2: Convert to fraction form
    540.81/811.08 = 266.64/x
  3. Step 3: Cross multiply
    540.81x = 811.08 × 266.64
  4. Step 4: Simplify right side
    540.81x = 216,266.37
  5. Step 5: Solve for x
    x = 216,266.37/540.81
  6. Step 6: Final answer
    x = 399.89

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