Home / 1,081.42-1,622-351

Finding the Fourth Proportional to 1,081.42, 1,622 and 351

Calculator

Solution

The fourth proportional to 1,081.42, 1,622 and 351 is: 526.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.42 : 1,622 = 351 : x
  2. Step 2: Convert to fraction form
    1,081.42/1,622 = 351/x
  3. Step 3: Cross multiply
    1,081.42x = 1,622 × 351
  4. Step 4: Simplify right side
    1,081.42x = 569,322
  5. Step 5: Solve for x
    x = 569,322/1,081.42
  6. Step 6: Final answer
    x = 526.46

Related Problems

Find fourth proportional to 540.71, 811 and 175.50
Half scale
Find fourth proportional to 2,162.84, 3,244 and 702
Double scale
Find fourth proportional to 1,082.42, 1,623.50 and 352
Similar ratio
Find fourth proportional to 1,622.13, 2,433 and 526.50
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.