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Finding the Third Proportional to 299.75 and 454

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Solution

The third proportional to 299.75 and 454 is: 687.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.75 : 454 = 454 : x
  2. Step 2: Convert to fraction form
    299.75/454 = 454/x
  3. Step 3: Cross multiply
    299.75x = 454 × 454
  4. Step 4: Simplify right side
    299.75x = 206,116
  5. Step 5: Solve for x
    x = 206,116/299.75
  6. Step 6: Final answer
    x = 687.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.