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Finding the Third Proportional to 1,994 and 3,943

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Solution

The third proportional to 1,994 and 3,943 is: 7,797.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994 : 3,943 = 3,943 : x
  2. Step 2: Convert to fraction form
    1,994/3,943 = 3,943/x
  3. Step 3: Cross multiply
    1,994x = 3,943 × 3,943
  4. Step 4: Simplify right side
    1,994x = 15,547,249
  5. Step 5: Solve for x
    x = 15,547,249/1,994
  6. Step 6: Final answer
    x = 7,797.02

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Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.