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Finding the Fourth Proportional to 409.97, 565.79 and 223.47

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Solution

The fourth proportional to 409.97, 565.79 and 223.47 is: 308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.97 : 565.79 = 223.47 : x
  2. Step 2: Convert to fraction form
    409.97/565.79 = 223.47/x
  3. Step 3: Cross multiply
    409.97x = 565.79 × 223.47
  4. Step 4: Simplify right side
    409.97x = 126,435.97
  5. Step 5: Solve for x
    x = 126,435.97/409.97
  6. Step 6: Final answer
    x = 308.40

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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.