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Finding the Third Proportional to 1,391.50 and 3,021

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Solution

The third proportional to 1,391.50 and 3,021 is: 6,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.50 : 3,021 = 3,021 : x
  2. Step 2: Convert to fraction form
    1,391.50/3,021 = 3,021/x
  3. Step 3: Cross multiply
    1,391.50x = 3,021 × 3,021
  4. Step 4: Simplify right side
    1,391.50x = 9,126,441
  5. Step 5: Solve for x
    x = 9,126,441/1,391.50
  6. Step 6: Final answer
    x = 6,558.71

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.