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Finding the Third Proportional to 489.09 and 1,000.69

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Solution

The third proportional to 489.09 and 1,000.69 is: 2,047.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.09 : 1,000.69 = 1,000.69 : x
  2. Step 2: Convert to fraction form
    489.09/1,000.69 = 1,000.69/x
  3. Step 3: Cross multiply
    489.09x = 1,000.69 × 1,000.69
  4. Step 4: Simplify right side
    489.09x = 1,001,375.47
  5. Step 5: Solve for x
    x = 1,001,375.47/489.09
  6. Step 6: Final answer
    x = 2,047.41

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.