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Finding the Third Proportional to 1,445.19 and 3,120.71

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Solution

The third proportional to 1,445.19 and 3,120.71 is: 6,738.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.19 : 3,120.71 = 3,120.71 : x
  2. Step 2: Convert to fraction form
    1,445.19/3,120.71 = 3,120.71/x
  3. Step 3: Cross multiply
    1,445.19x = 3,120.71 × 3,120.71
  4. Step 4: Simplify right side
    1,445.19x = 9,738,861.14
  5. Step 5: Solve for x
    x = 9,738,861.14/1,445.19
  6. Step 6: Final answer
    x = 6,738.83

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.