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Finding the Fourth Proportional to 604.12, 905.38 and 311.36

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Solution

The fourth proportional to 604.12, 905.38 and 311.36 is: 466.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.12 : 905.38 = 311.36 : x
  2. Step 2: Convert to fraction form
    604.12/905.38 = 311.36/x
  3. Step 3: Cross multiply
    604.12x = 905.38 × 311.36
  4. Step 4: Simplify right side
    604.12x = 281,899.12
  5. Step 5: Solve for x
    x = 281,899.12/604.12
  6. Step 6: Final answer
    x = 466.63

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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.