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Finding the Third Proportional to 857.25 and 1,374.38

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Solution

The third proportional to 857.25 and 1,374.38 is: 2,203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.25 : 1,374.38 = 1,374.38 : x
  2. Step 2: Convert to fraction form
    857.25/1,374.38 = 1,374.38/x
  3. Step 3: Cross multiply
    857.25x = 1,374.38 × 1,374.38
  4. Step 4: Simplify right side
    857.25x = 1,888,906.64
  5. Step 5: Solve for x
    x = 1,888,906.64/857.25
  6. Step 6: Final answer
    x = 2,203.45

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.