Home / 4.85-7.28-2

Finding the Fourth Proportional to 4.85, 7.28 and 2

Calculator

Solution

The fourth proportional to 4.85, 7.28 and 2 is: 3.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.85 : 7.28 = 2 : x
  2. Step 2: Convert to fraction form
    4.85/7.28 = 2/x
  3. Step 3: Cross multiply
    4.85x = 7.28 × 2
  4. Step 4: Simplify right side
    4.85x = 14.56
  5. Step 5: Solve for x
    x = 14.56/4.85
  6. Step 6: Final answer
    x = 3.00

Related Problems

Find fourth proportional to 2.43, 3.64 and 1
Half scale
Find fourth proportional to 9.70, 14.56 and 4
Double scale
Find fourth proportional to 5.85, 8.78 and 3
Similar ratio
Find fourth proportional to 7.28, 10.92 and 3
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.