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Finding the Fourth Proportional to 409.22, 564.91 and 243.49

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Solution

The fourth proportional to 409.22, 564.91 and 243.49 is: 336.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.22 : 564.91 = 243.49 : x
  2. Step 2: Convert to fraction form
    409.22/564.91 = 243.49/x
  3. Step 3: Cross multiply
    409.22x = 564.91 × 243.49
  4. Step 4: Simplify right side
    409.22x = 137,549.94
  5. Step 5: Solve for x
    x = 137,549.94/409.22
  6. Step 6: Final answer
    x = 336.13

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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.