Home / 1,378.50-2,067.75-352.50

Finding the Fourth Proportional to 1,378.50, 2,067.75 and 352.50

Calculator

Solution

The fourth proportional to 1,378.50, 2,067.75 and 352.50 is: 528.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.50 : 2,067.75 = 352.50 : x
  2. Step 2: Convert to fraction form
    1,378.50/2,067.75 = 352.50/x
  3. Step 3: Cross multiply
    1,378.50x = 2,067.75 × 352.50
  4. Step 4: Simplify right side
    1,378.50x = 728,881.88
  5. Step 5: Solve for x
    x = 728,881.88/1,378.50
  6. Step 6: Final answer
    x = 528.75

Related Problems

Find fourth proportional to 689.25, 1,033.88 and 176.25
Half scale
Find fourth proportional to 2,757, 4,135.50 and 705
Double scale
Find fourth proportional to 1,379.50, 2,069.25 and 353.50
Similar ratio
Find fourth proportional to 2,067.75, 3,101.63 and 528.75
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.