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Finding the Fourth Proportional to 646.02, 891.12 and 459.48

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Solution

The fourth proportional to 646.02, 891.12 and 459.48 is: 633.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.02 : 891.12 = 459.48 : x
  2. Step 2: Convert to fraction form
    646.02/891.12 = 459.48/x
  3. Step 3: Cross multiply
    646.02x = 891.12 × 459.48
  4. Step 4: Simplify right side
    646.02x = 409,451.82
  5. Step 5: Solve for x
    x = 409,451.82/646.02
  6. Step 6: Final answer
    x = 633.81

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