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Finding the Third Proportional to 278.50 and 755.50

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Solution

The third proportional to 278.50 and 755.50 is: 2,049.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.50 : 755.50 = 755.50 : x
  2. Step 2: Convert to fraction form
    278.50/755.50 = 755.50/x
  3. Step 3: Cross multiply
    278.50x = 755.50 × 755.50
  4. Step 4: Simplify right side
    278.50x = 570,780.25
  5. Step 5: Solve for x
    x = 570,780.25/278.50
  6. Step 6: Final answer
    x = 2,049.48

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Why These Related Problems?

These problems maintain the same ratio (2.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.