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Finding the Third Proportional to 1,298.53 and 2,857.15

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Solution

The third proportional to 1,298.53 and 2,857.15 is: 6,286.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.53 : 2,857.15 = 2,857.15 : x
  2. Step 2: Convert to fraction form
    1,298.53/2,857.15 = 2,857.15/x
  3. Step 3: Cross multiply
    1,298.53x = 2,857.15 × 2,857.15
  4. Step 4: Simplify right side
    1,298.53x = 8,163,297.19
  5. Step 5: Solve for x
    x = 8,163,297.19/1,298.53
  6. Step 6: Final answer
    x = 6,286.56

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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.