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Finding the Fourth Proportional to 613.82, 921.10 and 229.34

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Solution

The fourth proportional to 613.82, 921.10 and 229.34 is: 344.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.82 : 921.10 = 229.34 : x
  2. Step 2: Convert to fraction form
    613.82/921.10 = 229.34/x
  3. Step 3: Cross multiply
    613.82x = 921.10 × 229.34
  4. Step 4: Simplify right side
    613.82x = 211,245.07
  5. Step 5: Solve for x
    x = 211,245.07/613.82
  6. Step 6: Final answer
    x = 344.15

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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.