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Finding the Third Proportional to 144,891 and 311,206

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Solution

The third proportional to 144,891 and 311,206 is: 668,427.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,891 : 311,206 = 311,206 : x
  2. Step 2: Convert to fraction form
    144,891/311,206 = 311,206/x
  3. Step 3: Cross multiply
    144,891x = 311,206 × 311,206
  4. Step 4: Simplify right side
    144,891x = 96,849,174,436
  5. Step 5: Solve for x
    x = 96,849,174,436/144,891
  6. Step 6: Final answer
    x = 668,427.81

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.