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Finding the Third Proportional to 980.50 and 1,739

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Solution

The third proportional to 980.50 and 1,739 is: 3,084.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.50 : 1,739 = 1,739 : x
  2. Step 2: Convert to fraction form
    980.50/1,739 = 1,739/x
  3. Step 3: Cross multiply
    980.50x = 1,739 × 1,739
  4. Step 4: Simplify right side
    980.50x = 3,024,121
  5. Step 5: Solve for x
    x = 3,024,121/980.50
  6. Step 6: Final answer
    x = 3,084.26

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.