Home / 3,876.51-5,814.69-1,279.38

Finding the Fourth Proportional to 3,876.51, 5,814.69 and 1,279.38

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Solution

The fourth proportional to 3,876.51, 5,814.69 and 1,279.38 is: 1,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.51 : 5,814.69 = 1,279.38 : x
  2. Step 2: Convert to fraction form
    3,876.51/5,814.69 = 1,279.38/x
  3. Step 3: Cross multiply
    3,876.51x = 5,814.69 × 1,279.38
  4. Step 4: Simplify right side
    3,876.51x = 7,439,198.09
  5. Step 5: Solve for x
    x = 7,439,198.09/3,876.51
  6. Step 6: Final answer
    x = 1,919.05

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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.