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Finding the Fourth Proportional to 613.44, 920.12 and 223.43

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Solution

The fourth proportional to 613.44, 920.12 and 223.43 is: 335.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.44 : 920.12 = 223.43 : x
  2. Step 2: Convert to fraction form
    613.44/920.12 = 223.43/x
  3. Step 3: Cross multiply
    613.44x = 920.12 × 223.43
  4. Step 4: Simplify right side
    613.44x = 205,576.69
  5. Step 5: Solve for x
    x = 205,576.69/613.44
  6. Step 6: Final answer
    x = 335.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.