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Finding the Third Proportional to 1,311.19 and 1,814.91

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Solution

The third proportional to 1,311.19 and 1,814.91 is: 2,512.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.19 : 1,814.91 = 1,814.91 : x
  2. Step 2: Convert to fraction form
    1,311.19/1,814.91 = 1,814.91/x
  3. Step 3: Cross multiply
    1,311.19x = 1,814.91 × 1,814.91
  4. Step 4: Simplify right side
    1,311.19x = 3,293,884.70
  5. Step 5: Solve for x
    x = 3,293,884.70/1,311.19
  6. Step 6: Final answer
    x = 2,512.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.