Home / 143-214.50-141.20

Finding the Fourth Proportional to 143, 214.50 and 141.20

Calculator

Solution

The fourth proportional to 143, 214.50 and 141.20 is: 211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143 : 214.50 = 141.20 : x
  2. Step 2: Convert to fraction form
    143/214.50 = 141.20/x
  3. Step 3: Cross multiply
    143x = 214.50 × 141.20
  4. Step 4: Simplify right side
    143x = 30,287.40
  5. Step 5: Solve for x
    x = 30,287.40/143
  6. Step 6: Final answer
    x = 211.80

Related Problems

Find fourth proportional to 71.50, 107.25 and 70.60
Half scale
Find fourth proportional to 286, 429 and 282.40
Double scale
Find fourth proportional to 144, 216 and 142.20
Similar ratio
Find fourth proportional to 214.50, 321.75 and 211.80
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.