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Finding the Fourth Proportional to 409.07, 564.43 and 243.23

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Solution

The fourth proportional to 409.07, 564.43 and 243.23 is: 335.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.07 : 564.43 = 243.23 : x
  2. Step 2: Convert to fraction form
    409.07/564.43 = 243.23/x
  3. Step 3: Cross multiply
    409.07x = 564.43 × 243.23
  4. Step 4: Simplify right side
    409.07x = 137,286.31
  5. Step 5: Solve for x
    x = 137,286.31/409.07
  6. Step 6: Final answer
    x = 335.61

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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.