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Finding the Third Proportional to 275,547 and 421,500.75

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Solution

The third proportional to 275,547 and 421,500.75 is: 644,764.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,547 : 421,500.75 = 421,500.75 : x
  2. Step 2: Convert to fraction form
    275,547/421,500.75 = 421,500.75/x
  3. Step 3: Cross multiply
    275,547x = 421,500.75 × 421,500.75
  4. Step 4: Simplify right side
    275,547x = 177,662,882,250.56
  5. Step 5: Solve for x
    x = 177,662,882,250.56/275,547
  6. Step 6: Final answer
    x = 644,764.35

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.