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Finding the Third Proportional to 980.50 and 2,153

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Solution

The third proportional to 980.50 and 2,153 is: 4,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.50 : 2,153 = 2,153 : x
  2. Step 2: Convert to fraction form
    980.50/2,153 = 2,153/x
  3. Step 3: Cross multiply
    980.50x = 2,153 × 2,153
  4. Step 4: Simplify right side
    980.50x = 4,635,409
  5. Step 5: Solve for x
    x = 4,635,409/980.50
  6. Step 6: Final answer
    x = 4,727.60

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.