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Finding the Third Proportional to 419,913 and 432,009

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Solution

The third proportional to 419,913 and 432,009 is: 444,453.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,913 : 432,009 = 432,009 : x
  2. Step 2: Convert to fraction form
    419,913/432,009 = 432,009/x
  3. Step 3: Cross multiply
    419,913x = 432,009 × 432,009
  4. Step 4: Simplify right side
    419,913x = 186,631,776,081
  5. Step 5: Solve for x
    x = 186,631,776,081/419,913
  6. Step 6: Final answer
    x = 444,453.44

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Why These Related Problems?

These problems maintain the same ratio (1.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.