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Finding the Third Proportional to 298.63 and 619.88

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Solution

The third proportional to 298.63 and 619.88 is: 1,286.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.63 : 619.88 = 619.88 : x
  2. Step 2: Convert to fraction form
    298.63/619.88 = 619.88/x
  3. Step 3: Cross multiply
    298.63x = 619.88 × 619.88
  4. Step 4: Simplify right side
    298.63x = 384,245.02
  5. Step 5: Solve for x
    x = 384,245.02/298.63
  6. Step 6: Final answer
    x = 1,286.71

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.