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Finding the Third Proportional to 1,113 and 2,390

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Solution

The third proportional to 1,113 and 2,390 is: 5,132.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113 : 2,390 = 2,390 : x
  2. Step 2: Convert to fraction form
    1,113/2,390 = 2,390/x
  3. Step 3: Cross multiply
    1,113x = 2,390 × 2,390
  4. Step 4: Simplify right side
    1,113x = 5,712,100
  5. Step 5: Solve for x
    x = 5,712,100/1,113
  6. Step 6: Final answer
    x = 5,132.17

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.