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Finding the Fourth Proportional to 223.81, 308.22 and 209.92

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Solution

The fourth proportional to 223.81, 308.22 and 209.92 is: 289.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.81 : 308.22 = 209.92 : x
  2. Step 2: Convert to fraction form
    223.81/308.22 = 209.92/x
  3. Step 3: Cross multiply
    223.81x = 308.22 × 209.92
  4. Step 4: Simplify right side
    223.81x = 64,701.54
  5. Step 5: Solve for x
    x = 64,701.54/223.81
  6. Step 6: Final answer
    x = 289.09

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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.