Home / 2.90-4-2.62

Finding the Fourth Proportional to 2.90, 4 and 2.62

Calculator

Solution

The fourth proportional to 2.90, 4 and 2.62 is: 3.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.90 : 4 = 2.62 : x
  2. Step 2: Convert to fraction form
    2.90/4 = 2.62/x
  3. Step 3: Cross multiply
    2.90x = 4 × 2.62
  4. Step 4: Simplify right side
    2.90x = 10.46
  5. Step 5: Solve for x
    x = 10.46/2.90
  6. Step 6: Final answer
    x = 3.61

Related Problems

Find fourth proportional to 1.45, 2 and 1.31
Half scale
Find fourth proportional to 5.79, 8 and 5.23
Double scale
Find fourth proportional to 3.90, 5.38 and 3.62
Similar ratio
Find fourth proportional to 4.34, 6 and 3.92
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.