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Finding the Fourth Proportional to 409.24, 564.53 and 243.39

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Solution

The fourth proportional to 409.24, 564.53 and 243.39 is: 335.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.24 : 564.53 = 243.39 : x
  2. Step 2: Convert to fraction form
    409.24/564.53 = 243.39/x
  3. Step 3: Cross multiply
    409.24x = 564.53 × 243.39
  4. Step 4: Simplify right side
    409.24x = 137,400.96
  5. Step 5: Solve for x
    x = 137,400.96/409.24
  6. Step 6: Final answer
    x = 335.75

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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.