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Finding the Fourth Proportional to 997.12, 1,376.04 and 604.18

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Solution

The fourth proportional to 997.12, 1,376.04 and 604.18 is: 833.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.12 : 1,376.04 = 604.18 : x
  2. Step 2: Convert to fraction form
    997.12/1,376.04 = 604.18/x
  3. Step 3: Cross multiply
    997.12x = 1,376.04 × 604.18
  4. Step 4: Simplify right side
    997.12x = 831,375.85
  5. Step 5: Solve for x
    x = 831,375.85/997.12
  6. Step 6: Final answer
    x = 833.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.