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Finding the Third Proportional to 534.75 and 786.75

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Solution

The third proportional to 534.75 and 786.75 is: 1,157.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.75 : 786.75 = 786.75 : x
  2. Step 2: Convert to fraction form
    534.75/786.75 = 786.75/x
  3. Step 3: Cross multiply
    534.75x = 786.75 × 786.75
  4. Step 4: Simplify right side
    534.75x = 618,975.56
  5. Step 5: Solve for x
    x = 618,975.56/534.75
  6. Step 6: Final answer
    x = 1,157.50

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.