Home / 299-448.56-128

Finding the Fourth Proportional to 299, 448.56 and 128

Calculator

Solution

The fourth proportional to 299, 448.56 and 128 is: 192.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    299 : 448.56 = 128 : x
  2. Step 2: Convert to fraction form
    299/448.56 = 128/x
  3. Step 3: Cross multiply
    299x = 448.56 × 128
  4. Step 4: Simplify right side
    299x = 57,415.68
  5. Step 5: Solve for x
    x = 57,415.68/299
  6. Step 6: Final answer
    x = 192.03

Related Problems

Find fourth proportional to 149.50, 224.28 and 64
Half scale
Find fourth proportional to 598, 897.12 and 256
Double scale
Find fourth proportional to 300, 450.06 and 129
Similar ratio
Find fourth proportional to 448.50, 672.84 and 192
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.