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Finding the Fourth Proportional to 409.26, 564.60 and 243.39

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Solution

The fourth proportional to 409.26, 564.60 and 243.39 is: 335.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.26 : 564.60 = 243.39 : x
  2. Step 2: Convert to fraction form
    409.26/564.60 = 243.39/x
  3. Step 3: Cross multiply
    409.26x = 564.60 × 243.39
  4. Step 4: Simplify right side
    409.26x = 137,417.99
  5. Step 5: Solve for x
    x = 137,417.99/409.26
  6. Step 6: Final answer
    x = 335.77

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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.