Home / 371-556.50-143

Finding the Fourth Proportional to 371, 556.50 and 143

Calculator

Solution

The fourth proportional to 371, 556.50 and 143 is: 214.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    371 : 556.50 = 143 : x
  2. Step 2: Convert to fraction form
    371/556.50 = 143/x
  3. Step 3: Cross multiply
    371x = 556.50 × 143
  4. Step 4: Simplify right side
    371x = 79,579.50
  5. Step 5: Solve for x
    x = 79,579.50/371
  6. Step 6: Final answer
    x = 214.50

Related Problems

Find fourth proportional to 185.50, 278.25 and 71.50
Half scale
Find fourth proportional to 742, 1,113 and 286
Double scale
Find fourth proportional to 372, 558 and 144
Similar ratio
Find fourth proportional to 556.50, 834.75 and 214.50
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.