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Finding the Third Proportional to 3,620 and 4,889

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Solution

The third proportional to 3,620 and 4,889 is: 6,602.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620 : 4,889 = 4,889 : x
  2. Step 2: Convert to fraction form
    3,620/4,889 = 4,889/x
  3. Step 3: Cross multiply
    3,620x = 4,889 × 4,889
  4. Step 4: Simplify right side
    3,620x = 23,902,321
  5. Step 5: Solve for x
    x = 23,902,321/3,620
  6. Step 6: Final answer
    x = 6,602.85

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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.