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Finding the Fourth Proportional to 408.43, 563.32 and 325.20

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Solution

The fourth proportional to 408.43, 563.32 and 325.20 is: 448.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.43 : 563.32 = 325.20 : x
  2. Step 2: Convert to fraction form
    408.43/563.32 = 325.20/x
  3. Step 3: Cross multiply
    408.43x = 563.32 × 325.20
  4. Step 4: Simplify right side
    408.43x = 183,191.66
  5. Step 5: Solve for x
    x = 183,191.66/408.43
  6. Step 6: Final answer
    x = 448.53

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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.