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Finding the Third Proportional to 201,910 and 311,290

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Solution

The third proportional to 201,910 and 311,290 is: 479,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,910 : 311,290 = 311,290 : x
  2. Step 2: Convert to fraction form
    201,910/311,290 = 311,290/x
  3. Step 3: Cross multiply
    201,910x = 311,290 × 311,290
  4. Step 4: Simplify right side
    201,910x = 96,901,464,100
  5. Step 5: Solve for x
    x = 96,901,464,100/201,910
  6. Step 6: Final answer
    x = 479,924.05

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.