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Finding the Third Proportional to 448,631 and 689,578

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Solution

The third proportional to 448,631 and 689,578 is: 1,059,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,631 : 689,578 = 689,578 : x
  2. Step 2: Convert to fraction form
    448,631/689,578 = 689,578/x
  3. Step 3: Cross multiply
    448,631x = 689,578 × 689,578
  4. Step 4: Simplify right side
    448,631x = 475,517,818,084
  5. Step 5: Solve for x
    x = 475,517,818,084/448,631
  6. Step 6: Final answer
    x = 1,059,930.81

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.