Home / 2.08-2.87-2

Finding the Fourth Proportional to 2.08, 2.87 and 2

Calculator

Solution

The fourth proportional to 2.08, 2.87 and 2 is: 2.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.08 : 2.87 = 2 : x
  2. Step 2: Convert to fraction form
    2.08/2.87 = 2/x
  3. Step 3: Cross multiply
    2.08x = 2.87 × 2
  4. Step 4: Simplify right side
    2.08x = 5.74
  5. Step 5: Solve for x
    x = 5.74/2.08
  6. Step 6: Final answer
    x = 2.76

Related Problems

Find fourth proportional to 1.04, 1.44 and 1
Half scale
Find fourth proportional to 4.16, 5.74 and 4
Double scale
Find fourth proportional to 3.08, 4.25 and 3
Similar ratio
Find fourth proportional to 3.12, 4.31 and 3
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.