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Finding the Third Proportional to 299,736 and 641,988

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Solution

The third proportional to 299,736 and 641,988 is: 1,375,038.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,736 : 641,988 = 641,988 : x
  2. Step 2: Convert to fraction form
    299,736/641,988 = 641,988/x
  3. Step 3: Cross multiply
    299,736x = 641,988 × 641,988
  4. Step 4: Simplify right side
    299,736x = 412,148,592,144
  5. Step 5: Solve for x
    x = 412,148,592,144/299,736
  6. Step 6: Final answer
    x = 1,375,038.67

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.