Home / 191.12-286.20-144.40

Finding the Fourth Proportional to 191.12, 286.20 and 144.40

Calculator

Solution

The fourth proportional to 191.12, 286.20 and 144.40 is: 216.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.12 : 286.20 = 144.40 : x
  2. Step 2: Convert to fraction form
    191.12/286.20 = 144.40/x
  3. Step 3: Cross multiply
    191.12x = 286.20 × 144.40
  4. Step 4: Simplify right side
    191.12x = 41,327.28
  5. Step 5: Solve for x
    x = 41,327.28/191.12
  6. Step 6: Final answer
    x = 216.24

Related Problems

Find fourth proportional to 95.56, 143.10 and 72.20
Half scale
Find fourth proportional to 382.24, 572.40 and 288.80
Double scale
Find fourth proportional to 192.12, 287.70 and 145.40
Similar ratio
Find fourth proportional to 286.68, 429.30 and 216.60
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.