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Finding the Third Proportional to 1,338.75 and 2,905.31

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Solution

The third proportional to 1,338.75 and 2,905.31 is: 6,305.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.75 : 2,905.31 = 2,905.31 : x
  2. Step 2: Convert to fraction form
    1,338.75/2,905.31 = 2,905.31/x
  3. Step 3: Cross multiply
    1,338.75x = 2,905.31 × 2,905.31
  4. Step 4: Simplify right side
    1,338.75x = 8,440,840.72
  5. Step 5: Solve for x
    x = 8,440,840.72/1,338.75
  6. Step 6: Final answer
    x = 6,305.02

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.