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Finding the Third Proportional to 311,980.50 and 446,148.75

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Solution

The third proportional to 311,980.50 and 446,148.75 is: 638,016.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,980.50 : 446,148.75 = 446,148.75 : x
  2. Step 2: Convert to fraction form
    311,980.50/446,148.75 = 446,148.75/x
  3. Step 3: Cross multiply
    311,980.50x = 446,148.75 × 446,148.75
  4. Step 4: Simplify right side
    311,980.50x = 199,048,707,126.56
  5. Step 5: Solve for x
    x = 199,048,707,126.56/311,980.50
  6. Step 6: Final answer
    x = 638,016.50

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.