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Finding the Third Proportional to 4,978 and 6,243

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Solution

The third proportional to 4,978 and 6,243 is: 7,829.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978 : 6,243 = 6,243 : x
  2. Step 2: Convert to fraction form
    4,978/6,243 = 6,243/x
  3. Step 3: Cross multiply
    4,978x = 6,243 × 6,243
  4. Step 4: Simplify right side
    4,978x = 38,975,049
  5. Step 5: Solve for x
    x = 38,975,049/4,978
  6. Step 6: Final answer
    x = 7,829.46

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These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.