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Finding the Third Proportional to 300.25 and 438.88

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Solution

The third proportional to 300.25 and 438.88 is: 641.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.25 : 438.88 = 438.88 : x
  2. Step 2: Convert to fraction form
    300.25/438.88 = 438.88/x
  3. Step 3: Cross multiply
    300.25x = 438.88 × 438.88
  4. Step 4: Simplify right side
    300.25x = 192,611.27
  5. Step 5: Solve for x
    x = 192,611.27/300.25
  6. Step 6: Final answer
    x = 641.50

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.