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Finding the Fourth Proportional to 408.74, 564.12 and 343.22

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Solution

The fourth proportional to 408.74, 564.12 and 343.22 is: 473.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.74 : 564.12 = 343.22 : x
  2. Step 2: Convert to fraction form
    408.74/564.12 = 343.22/x
  3. Step 3: Cross multiply
    408.74x = 564.12 × 343.22
  4. Step 4: Simplify right side
    408.74x = 193,617.27
  5. Step 5: Solve for x
    x = 193,617.27/408.74
  6. Step 6: Final answer
    x = 473.69

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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.