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Finding the Third Proportional to 851.50 and 2,059

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Solution

The third proportional to 851.50 and 2,059 is: 4,978.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.50 : 2,059 = 2,059 : x
  2. Step 2: Convert to fraction form
    851.50/2,059 = 2,059/x
  3. Step 3: Cross multiply
    851.50x = 2,059 × 2,059
  4. Step 4: Simplify right side
    851.50x = 4,239,481
  5. Step 5: Solve for x
    x = 4,239,481/851.50
  6. Step 6: Final answer
    x = 4,978.84

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.