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Finding the Third Proportional to 1,916 and 2,958

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Solution

The third proportional to 1,916 and 2,958 is: 4,566.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916 : 2,958 = 2,958 : x
  2. Step 2: Convert to fraction form
    1,916/2,958 = 2,958/x
  3. Step 3: Cross multiply
    1,916x = 2,958 × 2,958
  4. Step 4: Simplify right side
    1,916x = 8,749,764
  5. Step 5: Solve for x
    x = 8,749,764/1,916
  6. Step 6: Final answer
    x = 4,566.68

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.