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Finding the Third Proportional to 5,479.88 and 8,219.81

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Solution

The third proportional to 5,479.88 and 8,219.81 is: 12,329.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.88 : 8,219.81 = 8,219.81 : x
  2. Step 2: Convert to fraction form
    5,479.88/8,219.81 = 8,219.81/x
  3. Step 3: Cross multiply
    5,479.88x = 8,219.81 × 8,219.81
  4. Step 4: Simplify right side
    5,479.88x = 67,565,317.54
  5. Step 5: Solve for x
    x = 67,565,317.54/5,479.88
  6. Step 6: Final answer
    x = 12,329.72

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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.