Home / 2,107.61-3,161.81-808.97

Finding the Fourth Proportional to 2,107.61, 3,161.81 and 808.97

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Solution

The fourth proportional to 2,107.61, 3,161.81 and 808.97 is: 1,213.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.61 : 3,161.81 = 808.97 : x
  2. Step 2: Convert to fraction form
    2,107.61/3,161.81 = 808.97/x
  3. Step 3: Cross multiply
    2,107.61x = 3,161.81 × 808.97
  4. Step 4: Simplify right side
    2,107.61x = 2,557,789.58
  5. Step 5: Solve for x
    x = 2,557,789.58/2,107.61
  6. Step 6: Final answer
    x = 1,213.60

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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.