Home / 2,859.06-3,945.60-1,680.24

Finding the Fourth Proportional to 2,859.06, 3,945.60 and 1,680.24

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Solution

The fourth proportional to 2,859.06, 3,945.60 and 1,680.24 is: 2,318.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.06 : 3,945.60 = 1,680.24 : x
  2. Step 2: Convert to fraction form
    2,859.06/3,945.60 = 1,680.24/x
  3. Step 3: Cross multiply
    2,859.06x = 3,945.60 × 1,680.24
  4. Step 4: Simplify right side
    2,859.06x = 6,629,554.94
  5. Step 5: Solve for x
    x = 6,629,554.94/2,859.06
  6. Step 6: Final answer
    x = 2,318.79

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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.