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Finding the Third Proportional to 1,392 and 3,772

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Solution

The third proportional to 1,392 and 3,772 is: 10,221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392 : 3,772 = 3,772 : x
  2. Step 2: Convert to fraction form
    1,392/3,772 = 3,772/x
  3. Step 3: Cross multiply
    1,392x = 3,772 × 3,772
  4. Step 4: Simplify right side
    1,392x = 14,227,984
  5. Step 5: Solve for x
    x = 14,227,984/1,392
  6. Step 6: Final answer
    x = 10,221.25

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Why These Related Problems?

These problems maintain the same ratio (2.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.