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Finding the Third Proportional to 1,912 and 4,940

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Solution

The third proportional to 1,912 and 4,940 is: 12,763.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912 : 4,940 = 4,940 : x
  2. Step 2: Convert to fraction form
    1,912/4,940 = 4,940/x
  3. Step 3: Cross multiply
    1,912x = 4,940 × 4,940
  4. Step 4: Simplify right side
    1,912x = 24,403,600
  5. Step 5: Solve for x
    x = 24,403,600/1,912
  6. Step 6: Final answer
    x = 12,763.39

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Why These Related Problems?

These problems maintain the same ratio (2.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.