Home / 2,106.81-3,161.66-808.29

Finding the Fourth Proportional to 2,106.81, 3,161.66 and 808.29

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Solution

The fourth proportional to 2,106.81, 3,161.66 and 808.29 is: 1,212.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.81 : 3,161.66 = 808.29 : x
  2. Step 2: Convert to fraction form
    2,106.81/3,161.66 = 808.29/x
  3. Step 3: Cross multiply
    2,106.81x = 3,161.66 × 808.29
  4. Step 4: Simplify right side
    2,106.81x = 2,555,534.12
  5. Step 5: Solve for x
    x = 2,555,534.12/2,106.81
  6. Step 6: Final answer
    x = 1,212.99

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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.