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Finding the Third Proportional to 1,405 and 3,355

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Solution

The third proportional to 1,405 and 3,355 is: 8,011.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405 : 3,355 = 3,355 : x
  2. Step 2: Convert to fraction form
    1,405/3,355 = 3,355/x
  3. Step 3: Cross multiply
    1,405x = 3,355 × 3,355
  4. Step 4: Simplify right side
    1,405x = 11,256,025
  5. Step 5: Solve for x
    x = 11,256,025/1,405
  6. Step 6: Final answer
    x = 8,011.41

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.