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Finding the Fourth Proportional to 540.74, 810.51 and 266.25

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Solution

The fourth proportional to 540.74, 810.51 and 266.25 is: 399.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.74 : 810.51 = 266.25 : x
  2. Step 2: Convert to fraction form
    540.74/810.51 = 266.25/x
  3. Step 3: Cross multiply
    540.74x = 810.51 × 266.25
  4. Step 4: Simplify right side
    540.74x = 215,800.33
  5. Step 5: Solve for x
    x = 215,800.33/540.74
  6. Step 6: Final answer
    x = 399.08

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