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Finding the Third Proportional to 2,872.50 and 6,289.50

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Solution

The third proportional to 2,872.50 and 6,289.50 is: 13,771.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.50 : 6,289.50 = 6,289.50 : x
  2. Step 2: Convert to fraction form
    2,872.50/6,289.50 = 6,289.50/x
  3. Step 3: Cross multiply
    2,872.50x = 6,289.50 × 6,289.50
  4. Step 4: Simplify right side
    2,872.50x = 39,557,810.25
  5. Step 5: Solve for x
    x = 39,557,810.25/2,872.50
  6. Step 6: Final answer
    x = 13,771.21

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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.