Home / 1,891.09-2,609.62-1,105.57

Finding the Fourth Proportional to 1,891.09, 2,609.62 and 1,105.57

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Solution

The fourth proportional to 1,891.09, 2,609.62 and 1,105.57 is: 1,525.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.09 : 2,609.62 = 1,105.57 : x
  2. Step 2: Convert to fraction form
    1,891.09/2,609.62 = 1,105.57/x
  3. Step 3: Cross multiply
    1,891.09x = 2,609.62 × 1,105.57
  4. Step 4: Simplify right side
    1,891.09x = 2,885,117.58
  5. Step 5: Solve for x
    x = 2,885,117.58/1,891.09
  6. Step 6: Final answer
    x = 1,525.64

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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.