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Finding the Third Proportional to 1,953 and 3,138.75

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Solution

The third proportional to 1,953 and 3,138.75 is: 5,044.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953 : 3,138.75 = 3,138.75 : x
  2. Step 2: Convert to fraction form
    1,953/3,138.75 = 3,138.75/x
  3. Step 3: Cross multiply
    1,953x = 3,138.75 × 3,138.75
  4. Step 4: Simplify right side
    1,953x = 9,851,751.56
  5. Step 5: Solve for x
    x = 9,851,751.56/1,953
  6. Step 6: Final answer
    x = 5,044.42

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.