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Finding the Third Proportional to 1,485 and 3,243

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Solution

The third proportional to 1,485 and 3,243 is: 7,082.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485 : 3,243 = 3,243 : x
  2. Step 2: Convert to fraction form
    1,485/3,243 = 3,243/x
  3. Step 3: Cross multiply
    1,485x = 3,243 × 3,243
  4. Step 4: Simplify right side
    1,485x = 10,517,049
  5. Step 5: Solve for x
    x = 10,517,049/1,485
  6. Step 6: Final answer
    x = 7,082.19

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.