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Finding the Third Proportional to 668,421 and 1,391,917

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Solution

The third proportional to 668,421 and 1,391,917 is: 2,898,521.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,421 : 1,391,917 = 1,391,917 : x
  2. Step 2: Convert to fraction form
    668,421/1,391,917 = 1,391,917/x
  3. Step 3: Cross multiply
    668,421x = 1,391,917 × 1,391,917
  4. Step 4: Simplify right side
    668,421x = 1,937,432,934,889
  5. Step 5: Solve for x
    x = 1,937,432,934,889/668,421
  6. Step 6: Final answer
    x = 2,898,521.94

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.