Home / 1,908.79-2,858.06-1,211.69

Finding the Fourth Proportional to 1,908.79, 2,858.06 and 1,211.69

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Solution

The fourth proportional to 1,908.79, 2,858.06 and 1,211.69 is: 1,814.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.79 : 2,858.06 = 1,211.69 : x
  2. Step 2: Convert to fraction form
    1,908.79/2,858.06 = 1,211.69/x
  3. Step 3: Cross multiply
    1,908.79x = 2,858.06 × 1,211.69
  4. Step 4: Simplify right side
    1,908.79x = 3,463,074.06
  5. Step 5: Solve for x
    x = 3,463,074.06/1,908.79
  6. Step 6: Final answer
    x = 1,814.27

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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.