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Finding the Third Proportional to 1,911.94 and 2,939.91

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Solution

The third proportional to 1,911.94 and 2,939.91 is: 4,520.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.94 : 2,939.91 = 2,939.91 : x
  2. Step 2: Convert to fraction form
    1,911.94/2,939.91 = 2,939.91/x
  3. Step 3: Cross multiply
    1,911.94x = 2,939.91 × 2,939.91
  4. Step 4: Simplify right side
    1,911.94x = 8,643,048.76
  5. Step 5: Solve for x
    x = 8,643,048.76/1,911.94
  6. Step 6: Final answer
    x = 4,520.57

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.