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Finding the Third Proportional to 1,931 and 3,020.50

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Solution

The third proportional to 1,931 and 3,020.50 is: 4,724.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931 : 3,020.50 = 3,020.50 : x
  2. Step 2: Convert to fraction form
    1,931/3,020.50 = 3,020.50/x
  3. Step 3: Cross multiply
    1,931x = 3,020.50 × 3,020.50
  4. Step 4: Simplify right side
    1,931x = 9,123,420.25
  5. Step 5: Solve for x
    x = 9,123,420.25/1,931
  6. Step 6: Final answer
    x = 4,724.71

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.