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Finding the Fourth Proportional to 2,679.75, 4,018.19 and 830.37

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Solution

The fourth proportional to 2,679.75, 4,018.19 and 830.37 is: 1,245.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.75 : 4,018.19 = 830.37 : x
  2. Step 2: Convert to fraction form
    2,679.75/4,018.19 = 830.37/x
  3. Step 3: Cross multiply
    2,679.75x = 4,018.19 × 830.37
  4. Step 4: Simplify right side
    2,679.75x = 3,336,584.43
  5. Step 5: Solve for x
    x = 3,336,584.43/2,679.75
  6. Step 6: Final answer
    x = 1,245.11

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1.5x scale

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.