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Finding the Fourth Proportional to 997.85, 1,376.78 and 604.80

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Solution

The fourth proportional to 997.85, 1,376.78 and 604.80 is: 834.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.85 : 1,376.78 = 604.80 : x
  2. Step 2: Convert to fraction form
    997.85/1,376.78 = 604.80/x
  3. Step 3: Cross multiply
    997.85x = 1,376.78 × 604.80
  4. Step 4: Simplify right side
    997.85x = 832,673.52
  5. Step 5: Solve for x
    x = 832,673.52/997.85
  6. Step 6: Final answer
    x = 834.47

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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.