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Finding the Fourth Proportional to 997.66, 1,376.80 and 604.60

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Solution

The fourth proportional to 997.66, 1,376.80 and 604.60 is: 834.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.66 : 1,376.80 = 604.60 : x
  2. Step 2: Convert to fraction form
    997.66/1,376.80 = 604.60/x
  3. Step 3: Cross multiply
    997.66x = 1,376.80 × 604.60
  4. Step 4: Simplify right side
    997.66x = 832,413.28
  5. Step 5: Solve for x
    x = 832,413.28/997.66
  6. Step 6: Final answer
    x = 834.37

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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.