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Finding the Third Proportional to 2,090 and 2,815

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Solution

The third proportional to 2,090 and 2,815 is: 3,791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090 : 2,815 = 2,815 : x
  2. Step 2: Convert to fraction form
    2,090/2,815 = 2,815/x
  3. Step 3: Cross multiply
    2,090x = 2,815 × 2,815
  4. Step 4: Simplify right side
    2,090x = 7,924,225
  5. Step 5: Solve for x
    x = 7,924,225/2,090
  6. Step 6: Final answer
    x = 3,791.50

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.