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Finding the Third Proportional to 1,981 and 4,319

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Solution

The third proportional to 1,981 and 4,319 is: 9,416.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981 : 4,319 = 4,319 : x
  2. Step 2: Convert to fraction form
    1,981/4,319 = 4,319/x
  3. Step 3: Cross multiply
    1,981x = 4,319 × 4,319
  4. Step 4: Simplify right side
    1,981x = 18,653,761
  5. Step 5: Solve for x
    x = 18,653,761/1,981
  6. Step 6: Final answer
    x = 9,416.34

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.