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Finding the Fourth Proportional to 604.38, 905.19 and 398.88

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Solution

The fourth proportional to 604.38, 905.19 and 398.88 is: 597.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.38 : 905.19 = 398.88 : x
  2. Step 2: Convert to fraction form
    604.38/905.19 = 398.88/x
  3. Step 3: Cross multiply
    604.38x = 905.19 × 398.88
  4. Step 4: Simplify right side
    604.38x = 361,062.19
  5. Step 5: Solve for x
    x = 361,062.19/604.38
  6. Step 6: Final answer
    x = 597.41

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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.