Home / 2,139.75-2,953.26-1,208.25

Finding the Fourth Proportional to 2,139.75, 2,953.26 and 1,208.25

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Solution

The fourth proportional to 2,139.75, 2,953.26 and 1,208.25 is: 1,667.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.75 : 2,953.26 = 1,208.25 : x
  2. Step 2: Convert to fraction form
    2,139.75/2,953.26 = 1,208.25/x
  3. Step 3: Cross multiply
    2,139.75x = 2,953.26 × 1,208.25
  4. Step 4: Simplify right side
    2,139.75x = 3,568,276.40
  5. Step 5: Solve for x
    x = 3,568,276.40/2,139.75
  6. Step 6: Final answer
    x = 1,667.61

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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.