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Finding the Third Proportional to 426.50 and 919.25

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Solution

The third proportional to 426.50 and 919.25 is: 1,981.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.50 : 919.25 = 919.25 : x
  2. Step 2: Convert to fraction form
    426.50/919.25 = 919.25/x
  3. Step 3: Cross multiply
    426.50x = 919.25 × 919.25
  4. Step 4: Simplify right side
    426.50x = 845,020.56
  5. Step 5: Solve for x
    x = 845,020.56/426.50
  6. Step 6: Final answer
    x = 1,981.29

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.