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Finding the Fourth Proportional to 408.79, 563.78 and 325.27

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Solution

The fourth proportional to 408.79, 563.78 and 325.27 is: 448.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.79 : 563.78 = 325.27 : x
  2. Step 2: Convert to fraction form
    408.79/563.78 = 325.27/x
  3. Step 3: Cross multiply
    408.79x = 563.78 × 325.27
  4. Step 4: Simplify right side
    408.79x = 183,379.09
  5. Step 5: Solve for x
    x = 183,379.09/408.79
  6. Step 6: Final answer
    x = 448.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.