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Finding the Fourth Proportional to 2,678.94, 4,015.17 and 1,379.70

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Solution

The fourth proportional to 2,678.94, 4,015.17 and 1,379.70 is: 2,067.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.94 : 4,015.17 = 1,379.70 : x
  2. Step 2: Convert to fraction form
    2,678.94/4,015.17 = 1,379.70/x
  3. Step 3: Cross multiply
    2,678.94x = 4,015.17 × 1,379.70
  4. Step 4: Simplify right side
    2,678.94x = 5,539,730.05
  5. Step 5: Solve for x
    x = 5,539,730.05/2,678.94
  6. Step 6: Final answer
    x = 2,067.88

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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.