Home / 447-670.50-190.50

Finding the Fourth Proportional to 447, 670.50 and 190.50

Calculator

Solution

The fourth proportional to 447, 670.50 and 190.50 is: 285.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    447 : 670.50 = 190.50 : x
  2. Step 2: Convert to fraction form
    447/670.50 = 190.50/x
  3. Step 3: Cross multiply
    447x = 670.50 × 190.50
  4. Step 4: Simplify right side
    447x = 127,730.25
  5. Step 5: Solve for x
    x = 127,730.25/447
  6. Step 6: Final answer
    x = 285.75

Related Problems

Find fourth proportional to 223.50, 335.25 and 95.25
Half scale
Find fourth proportional to 894, 1,341 and 381
Double scale
Find fourth proportional to 448, 672 and 191.50
Similar ratio
Find fourth proportional to 670.50, 1,005.75 and 285.75
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.