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Finding the Third Proportional to 2,978 and 4,639

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Solution

The third proportional to 2,978 and 4,639 is: 7,226.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978 : 4,639 = 4,639 : x
  2. Step 2: Convert to fraction form
    2,978/4,639 = 4,639/x
  3. Step 3: Cross multiply
    2,978x = 4,639 × 4,639
  4. Step 4: Simplify right side
    2,978x = 21,520,321
  5. Step 5: Solve for x
    x = 21,520,321/2,978
  6. Step 6: Final answer
    x = 7,226.43

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These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.