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Finding the Fourth Proportional to 430.44, 645.56 and 122.21

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Solution

The fourth proportional to 430.44, 645.56 and 122.21 is: 183.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.44 : 645.56 = 122.21 : x
  2. Step 2: Convert to fraction form
    430.44/645.56 = 122.21/x
  3. Step 3: Cross multiply
    430.44x = 645.56 × 122.21
  4. Step 4: Simplify right side
    430.44x = 78,890.97
  5. Step 5: Solve for x
    x = 78,890.97/430.44
  6. Step 6: Final answer
    x = 183.28

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