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Finding the Third Proportional to 1,648 and 3,620

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Solution

The third proportional to 1,648 and 3,620 is: 7,951.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648 : 3,620 = 3,620 : x
  2. Step 2: Convert to fraction form
    1,648/3,620 = 3,620/x
  3. Step 3: Cross multiply
    1,648x = 3,620 × 3,620
  4. Step 4: Simplify right side
    1,648x = 13,104,400
  5. Step 5: Solve for x
    x = 13,104,400/1,648
  6. Step 6: Final answer
    x = 7,951.70

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.