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Finding the Third Proportional to 1,289.50 and 2,825

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Solution

The third proportional to 1,289.50 and 2,825 is: 6,188.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.50 : 2,825 = 2,825 : x
  2. Step 2: Convert to fraction form
    1,289.50/2,825 = 2,825/x
  3. Step 3: Cross multiply
    1,289.50x = 2,825 × 2,825
  4. Step 4: Simplify right side
    1,289.50x = 7,980,625
  5. Step 5: Solve for x
    x = 7,980,625/1,289.50
  6. Step 6: Final answer
    x = 6,188.93

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.