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Finding the Third Proportional to 841.75 and 1,170

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Solution

The third proportional to 841.75 and 1,170 is: 1,626.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.75 : 1,170 = 1,170 : x
  2. Step 2: Convert to fraction form
    841.75/1,170 = 1,170/x
  3. Step 3: Cross multiply
    841.75x = 1,170 × 1,170
  4. Step 4: Simplify right side
    841.75x = 1,368,900
  5. Step 5: Solve for x
    x = 1,368,900/841.75
  6. Step 6: Final answer
    x = 1,626.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.