Home / 851-1,276.50-338.36

Finding the Fourth Proportional to 851, 1,276.50 and 338.36

Calculator

Solution

The fourth proportional to 851, 1,276.50 and 338.36 is: 507.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    851 : 1,276.50 = 338.36 : x
  2. Step 2: Convert to fraction form
    851/1,276.50 = 338.36/x
  3. Step 3: Cross multiply
    851x = 1,276.50 × 338.36
  4. Step 4: Simplify right side
    851x = 431,916.54
  5. Step 5: Solve for x
    x = 431,916.54/851
  6. Step 6: Final answer
    x = 507.54

Related Problems

Find fourth proportional to 425.50, 638.25 and 169.18
Half scale
Find fourth proportional to 1,702, 2,553 and 676.72
Double scale
Find fourth proportional to 852, 1,278 and 339.36
Similar ratio
Find fourth proportional to 1,276.50, 1,914.75 and 507.54
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.