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Finding the Third Proportional to 789.75 and 1,690.88

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Solution

The third proportional to 789.75 and 1,690.88 is: 3,620.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.75 : 1,690.88 = 1,690.88 : x
  2. Step 2: Convert to fraction form
    789.75/1,690.88 = 1,690.88/x
  3. Step 3: Cross multiply
    789.75x = 1,690.88 × 1,690.88
  4. Step 4: Simplify right side
    789.75x = 2,859,058.27
  5. Step 5: Solve for x
    x = 2,859,058.27/789.75
  6. Step 6: Final answer
    x = 3,620.21

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.