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Finding the Third Proportional to 619.88 and 1,371.38

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Solution

The third proportional to 619.88 and 1,371.38 is: 3,033.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.88 : 1,371.38 = 1,371.38 : x
  2. Step 2: Convert to fraction form
    619.88/1,371.38 = 1,371.38/x
  3. Step 3: Cross multiply
    619.88x = 1,371.38 × 1,371.38
  4. Step 4: Simplify right side
    619.88x = 1,880,669.39
  5. Step 5: Solve for x
    x = 1,880,669.39/619.88
  6. Step 6: Final answer
    x = 3,033.95

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.