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Finding the Fourth Proportional to 604.10, 906.69 and 311.80

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Solution

The fourth proportional to 604.10, 906.69 and 311.80 is: 467.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.10 : 906.69 = 311.80 : x
  2. Step 2: Convert to fraction form
    604.10/906.69 = 311.80/x
  3. Step 3: Cross multiply
    604.10x = 906.69 × 311.80
  4. Step 4: Simplify right side
    604.10x = 282,705.94
  5. Step 5: Solve for x
    x = 282,705.94/604.10
  6. Step 6: Final answer
    x = 467.98

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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.