Home / 367.50-551.25-139.50

Finding the Fourth Proportional to 367.50, 551.25 and 139.50

Calculator

Solution

The fourth proportional to 367.50, 551.25 and 139.50 is: 209.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.50 : 551.25 = 139.50 : x
  2. Step 2: Convert to fraction form
    367.50/551.25 = 139.50/x
  3. Step 3: Cross multiply
    367.50x = 551.25 × 139.50
  4. Step 4: Simplify right side
    367.50x = 76,899.38
  5. Step 5: Solve for x
    x = 76,899.38/367.50
  6. Step 6: Final answer
    x = 209.25

Related Problems

Find fourth proportional to 183.75, 275.63 and 69.75
Half scale
Find fourth proportional to 735, 1,102.50 and 279
Double scale
Find fourth proportional to 368.50, 552.75 and 140.50
Similar ratio
Find fourth proportional to 551.25, 826.88 and 209.25
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.