Home / 3,442-5,163-1,390

Finding the Fourth Proportional to 3,442, 5,163 and 1,390

Calculator

Solution

The fourth proportional to 3,442, 5,163 and 1,390 is: 2,085

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,442 : 5,163 = 1,390 : x
  2. Step 2: Convert to fraction form
    3,442/5,163 = 1,390/x
  3. Step 3: Cross multiply
    3,442x = 5,163 × 1,390
  4. Step 4: Simplify right side
    3,442x = 7,176,570
  5. Step 5: Solve for x
    x = 7,176,570/3,442
  6. Step 6: Final answer
    x = 2,085

Related Problems

Find fourth proportional to 1,721, 2,581.50 and 695
Half scale
Find fourth proportional to 6,884, 10,326 and 2,780
Double scale
Find fourth proportional to 3,443, 5,164.50 and 1,391
Similar ratio
Find fourth proportional to 5,163, 7,744.50 and 2,085
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.