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Finding the Fourth Proportional to 409.25, 564.57 and 243.41

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Solution

The fourth proportional to 409.25, 564.57 and 243.41 is: 335.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.25 : 564.57 = 243.41 : x
  2. Step 2: Convert to fraction form
    409.25/564.57 = 243.41/x
  3. Step 3: Cross multiply
    409.25x = 564.57 × 243.41
  4. Step 4: Simplify right side
    409.25x = 137,419.16
  5. Step 5: Solve for x
    x = 137,419.16/409.25
  6. Step 6: Final answer
    x = 335.78

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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.