Home / 2,814.17-3,879.91-1,928.39

Finding the Fourth Proportional to 2,814.17, 3,879.91 and 1,928.39

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Solution

The fourth proportional to 2,814.17, 3,879.91 and 1,928.39 is: 2,658.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.17 : 3,879.91 = 1,928.39 : x
  2. Step 2: Convert to fraction form
    2,814.17/3,879.91 = 1,928.39/x
  3. Step 3: Cross multiply
    2,814.17x = 3,879.91 × 1,928.39
  4. Step 4: Simplify right side
    2,814.17x = 7,481,979.64
  5. Step 5: Solve for x
    x = 7,481,979.64/2,814.17
  6. Step 6: Final answer
    x = 2,658.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.