Home / 1,212.68-1,819.22-347

Finding the Fourth Proportional to 1,212.68, 1,819.22 and 347

Calculator

Solution

The fourth proportional to 1,212.68, 1,819.22 and 347 is: 520.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.68 : 1,819.22 = 347 : x
  2. Step 2: Convert to fraction form
    1,212.68/1,819.22 = 347/x
  3. Step 3: Cross multiply
    1,212.68x = 1,819.22 × 347
  4. Step 4: Simplify right side
    1,212.68x = 631,269.34
  5. Step 5: Solve for x
    x = 631,269.34/1,212.68
  6. Step 6: Final answer
    x = 520.56

Related Problems

Find fourth proportional to 606.34, 909.61 and 173.50
Half scale
Find fourth proportional to 2,425.36, 3,638.44 and 694
Double scale
Find fourth proportional to 1,213.68, 1,820.72 and 348
Similar ratio
Find fourth proportional to 1,819.02, 2,728.83 and 520.50
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.