Home / 470.08-705.04-128

Finding the Fourth Proportional to 470.08, 705.04 and 128

Calculator

Solution

The fourth proportional to 470.08, 705.04 and 128 is: 191.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.08 : 705.04 = 128 : x
  2. Step 2: Convert to fraction form
    470.08/705.04 = 128/x
  3. Step 3: Cross multiply
    470.08x = 705.04 × 128
  4. Step 4: Simplify right side
    470.08x = 90,245.12
  5. Step 5: Solve for x
    x = 90,245.12/470.08
  6. Step 6: Final answer
    x = 191.98

Related Problems

Find fourth proportional to 235.04, 352.52 and 64
Half scale
Find fourth proportional to 940.16, 1,410.08 and 256
Double scale
Find fourth proportional to 471.08, 706.54 and 129
Similar ratio
Find fourth proportional to 705.12, 1,057.56 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.