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Finding the Third Proportional to 459,890 and 687,003

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Solution

The third proportional to 459,890 and 687,003 is: 1,026,273.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,890 : 687,003 = 687,003 : x
  2. Step 2: Convert to fraction form
    459,890/687,003 = 687,003/x
  3. Step 3: Cross multiply
    459,890x = 687,003 × 687,003
  4. Step 4: Simplify right side
    459,890x = 471,973,122,009
  5. Step 5: Solve for x
    x = 471,973,122,009/459,890
  6. Step 6: Final answer
    x = 1,026,273.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.