Home / 361.36-498-257.68

Finding the Fourth Proportional to 361.36, 498 and 257.68

Calculator

Solution

The fourth proportional to 361.36, 498 and 257.68 is: 355.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.36 : 498 = 257.68 : x
  2. Step 2: Convert to fraction form
    361.36/498 = 257.68/x
  3. Step 3: Cross multiply
    361.36x = 498 × 257.68
  4. Step 4: Simplify right side
    361.36x = 128,324.64
  5. Step 5: Solve for x
    x = 128,324.64/361.36
  6. Step 6: Final answer
    x = 355.12

Related Problems

Find fourth proportional to 180.68, 249 and 128.84
Half scale
Find fourth proportional to 722.72, 996 and 515.36
Double scale
Find fourth proportional to 362.36, 499.38 and 258.68
Similar ratio
Find fourth proportional to 542.04, 747 and 386.52
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.