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Finding the Fourth Proportional to 653.55, 980.26 and 406.81

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Solution

The fourth proportional to 653.55, 980.26 and 406.81 is: 610.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.55 : 980.26 = 406.81 : x
  2. Step 2: Convert to fraction form
    653.55/980.26 = 406.81/x
  3. Step 3: Cross multiply
    653.55x = 980.26 × 406.81
  4. Step 4: Simplify right side
    653.55x = 398,779.57
  5. Step 5: Solve for x
    x = 398,779.57/653.55
  6. Step 6: Final answer
    x = 610.17

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