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Finding the Fourth Proportional to 2,679.82, 4,018.18 and 830.44

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Solution

The fourth proportional to 2,679.82, 4,018.18 and 830.44 is: 1,245.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.82 : 4,018.18 = 830.44 : x
  2. Step 2: Convert to fraction form
    2,679.82/4,018.18 = 830.44/x
  3. Step 3: Cross multiply
    2,679.82x = 4,018.18 × 830.44
  4. Step 4: Simplify right side
    2,679.82x = 3,336,857.40
  5. Step 5: Solve for x
    x = 3,336,857.40/2,679.82
  6. Step 6: Final answer
    x = 1,245.18

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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.