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Finding the Third Proportional to 300,028 and 438,190

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Solution

The third proportional to 300,028 and 438,190 is: 639,975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,028 : 438,190 = 438,190 : x
  2. Step 2: Convert to fraction form
    300,028/438,190 = 438,190/x
  3. Step 3: Cross multiply
    300,028x = 438,190 × 438,190
  4. Step 4: Simplify right side
    300,028x = 192,010,476,100
  5. Step 5: Solve for x
    x = 192,010,476,100/300,028
  6. Step 6: Final answer
    x = 639,975.19

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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.