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Finding the Third Proportional to 311,910.75 and 678,253.50

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Solution

The third proportional to 311,910.75 and 678,253.50 is: 1,474,870.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,910.75 : 678,253.50 = 678,253.50 : x
  2. Step 2: Convert to fraction form
    311,910.75/678,253.50 = 678,253.50/x
  3. Step 3: Cross multiply
    311,910.75x = 678,253.50 × 678,253.50
  4. Step 4: Simplify right side
    311,910.75x = 460,027,810,262.25
  5. Step 5: Solve for x
    x = 460,027,810,262.25/311,910.75
  6. Step 6: Final answer
    x = 1,474,870.01

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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.