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Finding the Third Proportional to 3,190 and 6,470

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Solution

The third proportional to 3,190 and 6,470 is: 13,122.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190 : 6,470 = 6,470 : x
  2. Step 2: Convert to fraction form
    3,190/6,470 = 6,470/x
  3. Step 3: Cross multiply
    3,190x = 6,470 × 6,470
  4. Step 4: Simplify right side
    3,190x = 41,860,900
  5. Step 5: Solve for x
    x = 41,860,900/3,190
  6. Step 6: Final answer
    x = 13,122.54

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.