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Finding the Third Proportional to 2,643 and 4,115.25

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Solution

The third proportional to 2,643 and 4,115.25 is: 6,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643 : 4,115.25 = 4,115.25 : x
  2. Step 2: Convert to fraction form
    2,643/4,115.25 = 4,115.25/x
  3. Step 3: Cross multiply
    2,643x = 4,115.25 × 4,115.25
  4. Step 4: Simplify right side
    2,643x = 16,935,282.56
  5. Step 5: Solve for x
    x = 16,935,282.56/2,643
  6. Step 6: Final answer
    x = 6,407.60

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.