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Finding the Third Proportional to 1,247.06 and 2,638.31

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Solution

The third proportional to 1,247.06 and 2,638.31 is: 5,581.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.06 : 2,638.31 = 2,638.31 : x
  2. Step 2: Convert to fraction form
    1,247.06/2,638.31 = 2,638.31/x
  3. Step 3: Cross multiply
    1,247.06x = 2,638.31 × 2,638.31
  4. Step 4: Simplify right side
    1,247.06x = 6,960,692.85
  5. Step 5: Solve for x
    x = 6,960,692.85/1,247.06
  6. Step 6: Final answer
    x = 5,581.67

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.