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Finding the Third Proportional to 2,389.50 and 4,491

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Solution

The third proportional to 2,389.50 and 4,491 is: 8,440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.50 : 4,491 = 4,491 : x
  2. Step 2: Convert to fraction form
    2,389.50/4,491 = 4,491/x
  3. Step 3: Cross multiply
    2,389.50x = 4,491 × 4,491
  4. Step 4: Simplify right side
    2,389.50x = 20,169,081
  5. Step 5: Solve for x
    x = 20,169,081/2,389.50
  6. Step 6: Final answer
    x = 8,440.71

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.