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Finding the Fourth Proportional to 1,760.41, 2,641 and 664.78

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Solution

The fourth proportional to 1,760.41, 2,641 and 664.78 is: 997.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.41 : 2,641 = 664.78 : x
  2. Step 2: Convert to fraction form
    1,760.41/2,641 = 664.78/x
  3. Step 3: Cross multiply
    1,760.41x = 2,641 × 664.78
  4. Step 4: Simplify right side
    1,760.41x = 1,755,683.98
  5. Step 5: Solve for x
    x = 1,755,683.98/1,760.41
  6. Step 6: Final answer
    x = 997.32

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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.