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Finding the Third Proportional to 1,338 and 2,928

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Solution

The third proportional to 1,338 and 2,928 is: 6,407.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338 : 2,928 = 2,928 : x
  2. Step 2: Convert to fraction form
    1,338/2,928 = 2,928/x
  3. Step 3: Cross multiply
    1,338x = 2,928 × 2,928
  4. Step 4: Simplify right side
    1,338x = 8,573,184
  5. Step 5: Solve for x
    x = 8,573,184/1,338
  6. Step 6: Final answer
    x = 6,407.46

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.