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Finding the Third Proportional to 311,930 and 470,107

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Solution

The third proportional to 311,930 and 470,107 is: 708,494.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,930 : 470,107 = 470,107 : x
  2. Step 2: Convert to fraction form
    311,930/470,107 = 470,107/x
  3. Step 3: Cross multiply
    311,930x = 470,107 × 470,107
  4. Step 4: Simplify right side
    311,930x = 221,000,591,449
  5. Step 5: Solve for x
    x = 221,000,591,449/311,930
  6. Step 6: Final answer
    x = 708,494.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.