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Finding the Third Proportional to 429.05 and 939.09

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Solution

The third proportional to 429.05 and 939.09 is: 2,055.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.05 : 939.09 = 939.09 : x
  2. Step 2: Convert to fraction form
    429.05/939.09 = 939.09/x
  3. Step 3: Cross multiply
    429.05x = 939.09 × 939.09
  4. Step 4: Simplify right side
    429.05x = 881,897.07
  5. Step 5: Solve for x
    x = 881,897.07/429.05
  6. Step 6: Final answer
    x = 2,055.48

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.