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Finding the Fourth Proportional to 322.81, 445.55 and 223.45

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Solution

The fourth proportional to 322.81, 445.55 and 223.45 is: 308.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.81 : 445.55 = 223.45 : x
  2. Step 2: Convert to fraction form
    322.81/445.55 = 223.45/x
  3. Step 3: Cross multiply
    322.81x = 445.55 × 223.45
  4. Step 4: Simplify right side
    322.81x = 99,555.92
  5. Step 5: Solve for x
    x = 99,555.92/322.81
  6. Step 6: Final answer
    x = 308.41

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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.