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Finding the Third Proportional to 399.84 and 453.94

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Solution

The third proportional to 399.84 and 453.94 is: 515.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.84 : 453.94 = 453.94 : x
  2. Step 2: Convert to fraction form
    399.84/453.94 = 453.94/x
  3. Step 3: Cross multiply
    399.84x = 453.94 × 453.94
  4. Step 4: Simplify right side
    399.84x = 206,059.25
  5. Step 5: Solve for x
    x = 206,059.25/399.84
  6. Step 6: Final answer
    x = 515.35

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.