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Finding the Third Proportional to 922 and 2,190

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Solution

The third proportional to 922 and 2,190 is: 5,201.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    922 : 2,190 = 2,190 : x
  2. Step 2: Convert to fraction form
    922/2,190 = 2,190/x
  3. Step 3: Cross multiply
    922x = 2,190 × 2,190
  4. Step 4: Simplify right side
    922x = 4,796,100
  5. Step 5: Solve for x
    x = 4,796,100/922
  6. Step 6: Final answer
    x = 5,201.84

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Why These Related Problems?

These problems maintain the same ratio (2.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.