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Finding the Third Proportional to 668.50 and 1,013

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Solution

The third proportional to 668.50 and 1,013 is: 1,535.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.50 : 1,013 = 1,013 : x
  2. Step 2: Convert to fraction form
    668.50/1,013 = 1,013/x
  3. Step 3: Cross multiply
    668.50x = 1,013 × 1,013
  4. Step 4: Simplify right side
    668.50x = 1,026,169
  5. Step 5: Solve for x
    x = 1,026,169/668.50
  6. Step 6: Final answer
    x = 1,535.03

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.