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Finding the Third Proportional to 2,221.63 and 4,861.75

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Solution

The third proportional to 2,221.63 and 4,861.75 is: 10,639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.63 : 4,861.75 = 4,861.75 : x
  2. Step 2: Convert to fraction form
    2,221.63/4,861.75 = 4,861.75/x
  3. Step 3: Cross multiply
    2,221.63x = 4,861.75 × 4,861.75
  4. Step 4: Simplify right side
    2,221.63x = 23,636,613.06
  5. Step 5: Solve for x
    x = 23,636,613.06/2,221.63
  6. Step 6: Final answer
    x = 10,639.34

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.