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Finding the Third Proportional to 489.66 and 1,161.56

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Solution

The third proportional to 489.66 and 1,161.56 is: 2,755.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.66 : 1,161.56 = 1,161.56 : x
  2. Step 2: Convert to fraction form
    489.66/1,161.56 = 1,161.56/x
  3. Step 3: Cross multiply
    489.66x = 1,161.56 × 1,161.56
  4. Step 4: Simplify right side
    489.66x = 1,349,227.44
  5. Step 5: Solve for x
    x = 1,349,227.44/489.66
  6. Step 6: Final answer
    x = 2,755.46

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.