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Finding the Fourth Proportional to 2,674.36, 4,012.08 and 919.49

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Solution

The fourth proportional to 2,674.36, 4,012.08 and 919.49 is: 1,379.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,674.36 : 4,012.08 = 919.49 : x
  2. Step 2: Convert to fraction form
    2,674.36/4,012.08 = 919.49/x
  3. Step 3: Cross multiply
    2,674.36x = 4,012.08 × 919.49
  4. Step 4: Simplify right side
    2,674.36x = 3,689,067.44
  5. Step 5: Solve for x
    x = 3,689,067.44/2,674.36
  6. Step 6: Final answer
    x = 1,379.42

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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.