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Finding the Third Proportional to 1,966.78 and 4,237.31

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Solution

The third proportional to 1,966.78 and 4,237.31 is: 9,129.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.78 : 4,237.31 = 4,237.31 : x
  2. Step 2: Convert to fraction form
    1,966.78/4,237.31 = 4,237.31/x
  3. Step 3: Cross multiply
    1,966.78x = 4,237.31 × 4,237.31
  4. Step 4: Simplify right side
    1,966.78x = 17,954,817.22
  5. Step 5: Solve for x
    x = 17,954,817.22/1,966.78
  6. Step 6: Final answer
    x = 9,129.04

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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.