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Finding the Third Proportional to 1,428.75 and 2,170.69

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Solution

The third proportional to 1,428.75 and 2,170.69 is: 3,297.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.75 : 2,170.69 = 2,170.69 : x
  2. Step 2: Convert to fraction form
    1,428.75/2,170.69 = 2,170.69/x
  3. Step 3: Cross multiply
    1,428.75x = 2,170.69 × 2,170.69
  4. Step 4: Simplify right side
    1,428.75x = 4,711,884.22
  5. Step 5: Solve for x
    x = 4,711,884.22/1,428.75
  6. Step 6: Final answer
    x = 3,297.91

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.