Home / 446.50-669.99-218.50

Finding the Fourth Proportional to 446.50, 669.99 and 218.50

Calculator

Solution

The fourth proportional to 446.50, 669.99 and 218.50 is: 327.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.50 : 669.99 = 218.50 : x
  2. Step 2: Convert to fraction form
    446.50/669.99 = 218.50/x
  3. Step 3: Cross multiply
    446.50x = 669.99 × 218.50
  4. Step 4: Simplify right side
    446.50x = 146,392.82
  5. Step 5: Solve for x
    x = 146,392.82/446.50
  6. Step 6: Final answer
    x = 327.87

Related Problems

Find fourth proportional to 223.25, 335.00 and 109.25
Half scale
Find fourth proportional to 893, 1,339.98 and 437
Double scale
Find fourth proportional to 447.50, 671.49 and 219.50
Similar ratio
Find fourth proportional to 669.75, 1,004.99 and 327.75
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.