Home / 1,908.29-2,861.83-812.36

Finding the Fourth Proportional to 1,908.29, 2,861.83 and 812.36

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Solution

The fourth proportional to 1,908.29, 2,861.83 and 812.36 is: 1,218.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.29 : 2,861.83 = 812.36 : x
  2. Step 2: Convert to fraction form
    1,908.29/2,861.83 = 812.36/x
  3. Step 3: Cross multiply
    1,908.29x = 2,861.83 × 812.36
  4. Step 4: Simplify right side
    1,908.29x = 2,324,844.39
  5. Step 5: Solve for x
    x = 2,324,844.39/1,908.29
  6. Step 6: Final answer
    x = 1,218.29

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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.