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Finding the Third Proportional to 921.75 and 1,427.25

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Solution

The third proportional to 921.75 and 1,427.25 is: 2,209.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.75 : 1,427.25 = 1,427.25 : x
  2. Step 2: Convert to fraction form
    921.75/1,427.25 = 1,427.25/x
  3. Step 3: Cross multiply
    921.75x = 1,427.25 × 1,427.25
  4. Step 4: Simplify right side
    921.75x = 2,037,042.56
  5. Step 5: Solve for x
    x = 2,037,042.56/921.75
  6. Step 6: Final answer
    x = 2,209.97

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.