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Finding the Third Proportional to 1,678 and 2,518.50

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Solution

The third proportional to 1,678 and 2,518.50 is: 3,780.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678 : 2,518.50 = 2,518.50 : x
  2. Step 2: Convert to fraction form
    1,678/2,518.50 = 2,518.50/x
  3. Step 3: Cross multiply
    1,678x = 2,518.50 × 2,518.50
  4. Step 4: Simplify right side
    1,678x = 6,342,842.25
  5. Step 5: Solve for x
    x = 6,342,842.25/1,678
  6. Step 6: Final answer
    x = 3,780.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.