Home / 1,689.75-2,331.90-1,101.33

Finding the Fourth Proportional to 1,689.75, 2,331.90 and 1,101.33

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Solution

The fourth proportional to 1,689.75, 2,331.90 and 1,101.33 is: 1,519.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.75 : 2,331.90 = 1,101.33 : x
  2. Step 2: Convert to fraction form
    1,689.75/2,331.90 = 1,101.33/x
  3. Step 3: Cross multiply
    1,689.75x = 2,331.90 × 1,101.33
  4. Step 4: Simplify right side
    1,689.75x = 2,568,191.43
  5. Step 5: Solve for x
    x = 2,568,191.43/1,689.75
  6. Step 6: Final answer
    x = 1,519.86

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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.