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Finding the Third Proportional to 398.94 and 456.88

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Solution

The third proportional to 398.94 and 456.88 is: 523.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.94 : 456.88 = 456.88 : x
  2. Step 2: Convert to fraction form
    398.94/456.88 = 456.88/x
  3. Step 3: Cross multiply
    398.94x = 456.88 × 456.88
  4. Step 4: Simplify right side
    398.94x = 208,734.77
  5. Step 5: Solve for x
    x = 208,734.77/398.94
  6. Step 6: Final answer
    x = 523.23

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.