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Finding the Third Proportional to 3,470 and 7,390

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Solution

The third proportional to 3,470 and 7,390 is: 15,738.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,470 : 7,390 = 7,390 : x
  2. Step 2: Convert to fraction form
    3,470/7,390 = 7,390/x
  3. Step 3: Cross multiply
    3,470x = 7,390 × 7,390
  4. Step 4: Simplify right side
    3,470x = 54,612,100
  5. Step 5: Solve for x
    x = 54,612,100/3,470
  6. Step 6: Final answer
    x = 15,738.36

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.