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Finding the Third Proportional to 979.73 and 2,109.45

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Solution

The third proportional to 979.73 and 2,109.45 is: 4,541.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.73 : 2,109.45 = 2,109.45 : x
  2. Step 2: Convert to fraction form
    979.73/2,109.45 = 2,109.45/x
  3. Step 3: Cross multiply
    979.73x = 2,109.45 × 2,109.45
  4. Step 4: Simplify right side
    979.73x = 4,449,759.53
  5. Step 5: Solve for x
    x = 4,449,759.53/979.73
  6. Step 6: Final answer
    x = 4,541.80

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.