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Finding the Third Proportional to 2,188.50 and 3,390.75

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Solution

The third proportional to 2,188.50 and 3,390.75 is: 5,253.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.50 : 3,390.75 = 3,390.75 : x
  2. Step 2: Convert to fraction form
    2,188.50/3,390.75 = 3,390.75/x
  3. Step 3: Cross multiply
    2,188.50x = 3,390.75 × 3,390.75
  4. Step 4: Simplify right side
    2,188.50x = 11,497,185.56
  5. Step 5: Solve for x
    x = 11,497,185.56/2,188.50
  6. Step 6: Final answer
    x = 5,253.45

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.