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Finding the Third Proportional to 1,900 and 3,216

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Solution

The third proportional to 1,900 and 3,216 is: 5,443.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900 : 3,216 = 3,216 : x
  2. Step 2: Convert to fraction form
    1,900/3,216 = 3,216/x
  3. Step 3: Cross multiply
    1,900x = 3,216 × 3,216
  4. Step 4: Simplify right side
    1,900x = 10,342,656
  5. Step 5: Solve for x
    x = 10,342,656/1,900
  6. Step 6: Final answer
    x = 5,443.50

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Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.