Home / 3,178.08-4,767.12-1,638

Finding the Fourth Proportional to 3,178.08, 4,767.12 and 1,638

Calculator

Solution

The fourth proportional to 3,178.08, 4,767.12 and 1,638 is: 2,457

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.08 : 4,767.12 = 1,638 : x
  2. Step 2: Convert to fraction form
    3,178.08/4,767.12 = 1,638/x
  3. Step 3: Cross multiply
    3,178.08x = 4,767.12 × 1,638
  4. Step 4: Simplify right side
    3,178.08x = 7,808,542.56
  5. Step 5: Solve for x
    x = 7,808,542.56/3,178.08
  6. Step 6: Final answer
    x = 2,457

Related Problems

Find fourth proportional to 1,589.04, 2,383.56 and 819
Half scale
Find fourth proportional to 6,356.16, 9,534.24 and 3,276
Double scale
Find fourth proportional to 3,179.08, 4,768.62 and 1,639
Similar ratio
Find fourth proportional to 4,767.12, 7,150.68 and 2,457
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.