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Finding the Third Proportional to 676.69 and 1,490.06

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Solution

The third proportional to 676.69 and 1,490.06 is: 3,281.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.69 : 1,490.06 = 1,490.06 : x
  2. Step 2: Convert to fraction form
    676.69/1,490.06 = 1,490.06/x
  3. Step 3: Cross multiply
    676.69x = 1,490.06 × 1,490.06
  4. Step 4: Simplify right side
    676.69x = 2,220,286.25
  5. Step 5: Solve for x
    x = 2,220,286.25/676.69
  6. Step 6: Final answer
    x = 3,281.11

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.