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Finding the Third Proportional to 638,844 and 1,407,313

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Solution

The third proportional to 638,844 and 1,407,313 is: 3,100,177.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,844 : 1,407,313 = 1,407,313 : x
  2. Step 2: Convert to fraction form
    638,844/1,407,313 = 1,407,313/x
  3. Step 3: Cross multiply
    638,844x = 1,407,313 × 1,407,313
  4. Step 4: Simplify right side
    638,844x = 1,980,529,879,969
  5. Step 5: Solve for x
    x = 1,980,529,879,969/638,844
  6. Step 6: Final answer
    x = 3,100,177.63

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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.