Home / 2,138.60-3,207.90-1,550

Finding the Fourth Proportional to 2,138.60, 3,207.90 and 1,550

Calculator

Solution

The fourth proportional to 2,138.60, 3,207.90 and 1,550 is: 2,325

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.60 : 3,207.90 = 1,550 : x
  2. Step 2: Convert to fraction form
    2,138.60/3,207.90 = 1,550/x
  3. Step 3: Cross multiply
    2,138.60x = 3,207.90 × 1,550
  4. Step 4: Simplify right side
    2,138.60x = 4,972,245
  5. Step 5: Solve for x
    x = 4,972,245/2,138.60
  6. Step 6: Final answer
    x = 2,325

Related Problems

Find fourth proportional to 1,069.30, 1,603.95 and 775
Half scale
Find fourth proportional to 4,277.20, 6,415.80 and 3,100
Double scale
Find fourth proportional to 2,139.60, 3,209.40 and 1,551
Similar ratio
Find fourth proportional to 3,207.90, 4,811.85 and 2,325
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.