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Finding the Third Proportional to 1,605 and 3,855

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Solution

The third proportional to 1,605 and 3,855 is: 9,259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605 : 3,855 = 3,855 : x
  2. Step 2: Convert to fraction form
    1,605/3,855 = 3,855/x
  3. Step 3: Cross multiply
    1,605x = 3,855 × 3,855
  4. Step 4: Simplify right side
    1,605x = 14,861,025
  5. Step 5: Solve for x
    x = 14,861,025/1,605
  6. Step 6: Final answer
    x = 9,259.21

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These problems maintain the same ratio (2.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.