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Finding the Third Proportional to 916.50 and 1,851

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Solution

The third proportional to 916.50 and 1,851 is: 3,738.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.50 : 1,851 = 1,851 : x
  2. Step 2: Convert to fraction form
    916.50/1,851 = 1,851/x
  3. Step 3: Cross multiply
    916.50x = 1,851 × 1,851
  4. Step 4: Simplify right side
    916.50x = 3,426,201
  5. Step 5: Solve for x
    x = 3,426,201/916.50
  6. Step 6: Final answer
    x = 3,738.35

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.