Home / 209-313.50-95

Finding the Fourth Proportional to 209, 313.50 and 95

Calculator

Solution

The fourth proportional to 209, 313.50 and 95 is: 142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    209 : 313.50 = 95 : x
  2. Step 2: Convert to fraction form
    209/313.50 = 95/x
  3. Step 3: Cross multiply
    209x = 313.50 × 95
  4. Step 4: Simplify right side
    209x = 29,782.50
  5. Step 5: Solve for x
    x = 29,782.50/209
  6. Step 6: Final answer
    x = 142.50

Related Problems

Find fourth proportional to 104.50, 156.75 and 47.50
Half scale
Find fourth proportional to 418, 627 and 190
Double scale
Find fourth proportional to 210, 315 and 96
Similar ratio
Find fourth proportional to 313.50, 470.25 and 142.50
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.