Home / 435.78-601.55-278.41

Finding the Fourth Proportional to 435.78, 601.55 and 278.41

Calculator

Solution

The fourth proportional to 435.78, 601.55 and 278.41 is: 384.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.78 : 601.55 = 278.41 : x
  2. Step 2: Convert to fraction form
    435.78/601.55 = 278.41/x
  3. Step 3: Cross multiply
    435.78x = 601.55 × 278.41
  4. Step 4: Simplify right side
    435.78x = 167,477.54
  5. Step 5: Solve for x
    x = 167,477.54/435.78
  6. Step 6: Final answer
    x = 384.32

Related Problems

Find fourth proportional to 217.89, 300.78 and 139.21
Half scale
Find fourth proportional to 871.56, 1,203.10 and 556.82
Double scale
Find fourth proportional to 436.78, 602.93 and 279.41
Similar ratio
Find fourth proportional to 653.67, 902.33 and 417.62
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.