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Finding the Fourth Proportional to 900.81, 1,350.75 and 413.44

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Solution

The fourth proportional to 900.81, 1,350.75 and 413.44 is: 619.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.81 : 1,350.75 = 413.44 : x
  2. Step 2: Convert to fraction form
    900.81/1,350.75 = 413.44/x
  3. Step 3: Cross multiply
    900.81x = 1,350.75 × 413.44
  4. Step 4: Simplify right side
    900.81x = 558,452.25
  5. Step 5: Solve for x
    x = 558,452.25/900.81
  6. Step 6: Final answer
    x = 619.94

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