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Finding the Third Proportional to 638,532 and 1,376,721

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Solution

The third proportional to 638,532 and 1,376,721 is: 2,968,309.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,532 : 1,376,721 = 1,376,721 : x
  2. Step 2: Convert to fraction form
    638,532/1,376,721 = 1,376,721/x
  3. Step 3: Cross multiply
    638,532x = 1,376,721 × 1,376,721
  4. Step 4: Simplify right side
    638,532x = 1,895,360,711,841
  5. Step 5: Solve for x
    x = 1,895,360,711,841/638,532
  6. Step 6: Final answer
    x = 2,968,309.67

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.