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Finding the Third Proportional to 143,785 and 311,370

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Solution

The third proportional to 143,785 and 311,370 is: 674,279.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,785 : 311,370 = 311,370 : x
  2. Step 2: Convert to fraction form
    143,785/311,370 = 311,370/x
  3. Step 3: Cross multiply
    143,785x = 311,370 × 311,370
  4. Step 4: Simplify right side
    143,785x = 96,951,276,900
  5. Step 5: Solve for x
    x = 96,951,276,900/143,785
  6. Step 6: Final answer
    x = 674,279.49

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.