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Finding the Third Proportional to 1,138.22 and 2,489.34

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Solution

The third proportional to 1,138.22 and 2,489.34 is: 5,444.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.22 : 2,489.34 = 2,489.34 : x
  2. Step 2: Convert to fraction form
    1,138.22/2,489.34 = 2,489.34/x
  3. Step 3: Cross multiply
    1,138.22x = 2,489.34 × 2,489.34
  4. Step 4: Simplify right side
    1,138.22x = 6,196,832.31
  5. Step 5: Solve for x
    x = 6,196,832.31/1,138.22
  6. Step 6: Final answer
    x = 5,444.32

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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.