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Finding the Third Proportional to 705.50 and 1,122

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Solution

The third proportional to 705.50 and 1,122 is: 1,784.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.50 : 1,122 = 1,122 : x
  2. Step 2: Convert to fraction form
    705.50/1,122 = 1,122/x
  3. Step 3: Cross multiply
    705.50x = 1,122 × 1,122
  4. Step 4: Simplify right side
    705.50x = 1,258,884
  5. Step 5: Solve for x
    x = 1,258,884/705.50
  6. Step 6: Final answer
    x = 1,784.39

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.