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Finding the Third Proportional to 1,090 and 2,207

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Solution

The third proportional to 1,090 and 2,207 is: 4,468.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090 : 2,207 = 2,207 : x
  2. Step 2: Convert to fraction form
    1,090/2,207 = 2,207/x
  3. Step 3: Cross multiply
    1,090x = 2,207 × 2,207
  4. Step 4: Simplify right side
    1,090x = 4,870,849
  5. Step 5: Solve for x
    x = 4,870,849/1,090
  6. Step 6: Final answer
    x = 4,468.67

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.