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Finding the Fourth Proportional to 1,997.25, 2,996.32 and 610.78

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Solution

The fourth proportional to 1,997.25, 2,996.32 and 610.78 is: 916.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.25 : 2,996.32 = 610.78 : x
  2. Step 2: Convert to fraction form
    1,997.25/2,996.32 = 610.78/x
  3. Step 3: Cross multiply
    1,997.25x = 2,996.32 × 610.78
  4. Step 4: Simplify right side
    1,997.25x = 1,830,092.33
  5. Step 5: Solve for x
    x = 1,830,092.33/1,997.25
  6. Step 6: Final answer
    x = 916.31

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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.