Home / 2,886.78-3,981.44-1,942.26

Finding the Fourth Proportional to 2,886.78, 3,981.44 and 1,942.26

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Solution

The fourth proportional to 2,886.78, 3,981.44 and 1,942.26 is: 2,678.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.78 : 3,981.44 = 1,942.26 : x
  2. Step 2: Convert to fraction form
    2,886.78/3,981.44 = 1,942.26/x
  3. Step 3: Cross multiply
    2,886.78x = 3,981.44 × 1,942.26
  4. Step 4: Simplify right side
    2,886.78x = 7,732,991.65
  5. Step 5: Solve for x
    x = 7,732,991.65/2,886.78
  6. Step 6: Final answer
    x = 2,678.76

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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.