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Finding the Third Proportional to 2,129.50 and 3,289

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Solution

The third proportional to 2,129.50 and 3,289 is: 5,079.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.50 : 3,289 = 3,289 : x
  2. Step 2: Convert to fraction form
    2,129.50/3,289 = 3,289/x
  3. Step 3: Cross multiply
    2,129.50x = 3,289 × 3,289
  4. Step 4: Simplify right side
    2,129.50x = 10,817,521
  5. Step 5: Solve for x
    x = 10,817,521/2,129.50
  6. Step 6: Final answer
    x = 5,079.84

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.