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Finding the Fourth Proportional to 402.70, 604.05 and 229.42

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Solution

The fourth proportional to 402.70, 604.05 and 229.42 is: 344.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.70 : 604.05 = 229.42 : x
  2. Step 2: Convert to fraction form
    402.70/604.05 = 229.42/x
  3. Step 3: Cross multiply
    402.70x = 604.05 × 229.42
  4. Step 4: Simplify right side
    402.70x = 138,581.15
  5. Step 5: Solve for x
    x = 138,581.15/402.70
  6. Step 6: Final answer
    x = 344.13

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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.