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Finding the Third Proportional to 1,167 and 2,490

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Solution

The third proportional to 1,167 and 2,490 is: 5,312.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167 : 2,490 = 2,490 : x
  2. Step 2: Convert to fraction form
    1,167/2,490 = 2,490/x
  3. Step 3: Cross multiply
    1,167x = 2,490 × 2,490
  4. Step 4: Simplify right side
    1,167x = 6,200,100
  5. Step 5: Solve for x
    x = 6,200,100/1,167
  6. Step 6: Final answer
    x = 5,312.85

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.