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Finding the Third Proportional to 986.50 and 1,353

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Solution

The third proportional to 986.50 and 1,353 is: 1,855.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.50 : 1,353 = 1,353 : x
  2. Step 2: Convert to fraction form
    986.50/1,353 = 1,353/x
  3. Step 3: Cross multiply
    986.50x = 1,353 × 1,353
  4. Step 4: Simplify right side
    986.50x = 1,830,609
  5. Step 5: Solve for x
    x = 1,830,609/986.50
  6. Step 6: Final answer
    x = 1,855.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.