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Finding the Fourth Proportional to 409.69, 565.36 and 223.17

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Solution

The fourth proportional to 409.69, 565.36 and 223.17 is: 307.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.69 : 565.36 = 223.17 : x
  2. Step 2: Convert to fraction form
    409.69/565.36 = 223.17/x
  3. Step 3: Cross multiply
    409.69x = 565.36 × 223.17
  4. Step 4: Simplify right side
    409.69x = 126,171.39
  5. Step 5: Solve for x
    x = 126,171.39/409.69
  6. Step 6: Final answer
    x = 307.97

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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.