Home / 2,858.90-3,944.86-1,680.35

Finding the Fourth Proportional to 2,858.90, 3,944.86 and 1,680.35

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Solution

The fourth proportional to 2,858.90, 3,944.86 and 1,680.35 is: 2,318.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.90 : 3,944.86 = 1,680.35 : x
  2. Step 2: Convert to fraction form
    2,858.90/3,944.86 = 1,680.35/x
  3. Step 3: Cross multiply
    2,858.90x = 3,944.86 × 1,680.35
  4. Step 4: Simplify right side
    2,858.90x = 6,628,745.50
  5. Step 5: Solve for x
    x = 6,628,745.50/2,858.90
  6. Step 6: Final answer
    x = 2,318.63

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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.