Home / 2,129.75-2,939.07-1,198.25

Finding the Fourth Proportional to 2,129.75, 2,939.07 and 1,198.25

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Solution

The fourth proportional to 2,129.75, 2,939.07 and 1,198.25 is: 1,653.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.75 : 2,939.07 = 1,198.25 : x
  2. Step 2: Convert to fraction form
    2,129.75/2,939.07 = 1,198.25/x
  3. Step 3: Cross multiply
    2,129.75x = 2,939.07 × 1,198.25
  4. Step 4: Simplify right side
    2,129.75x = 3,521,740.63
  5. Step 5: Solve for x
    x = 3,521,740.63/2,129.75
  6. Step 6: Final answer
    x = 1,653.59

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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.