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Finding the Third Proportional to 411.94 and 617.91

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Solution

The third proportional to 411.94 and 617.91 is: 926.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.94 : 617.91 = 617.91 : x
  2. Step 2: Convert to fraction form
    411.94/617.91 = 617.91/x
  3. Step 3: Cross multiply
    411.94x = 617.91 × 617.91
  4. Step 4: Simplify right side
    411.94x = 381,808.13
  5. Step 5: Solve for x
    x = 381,808.13/411.94
  6. Step 6: Final answer
    x = 926.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.