Home / 888.88-1,334-478.36

Finding the Fourth Proportional to 888.88, 1,334 and 478.36

Calculator

Solution

The fourth proportional to 888.88, 1,334 and 478.36 is: 717.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.88 : 1,334 = 478.36 : x
  2. Step 2: Convert to fraction form
    888.88/1,334 = 478.36/x
  3. Step 3: Cross multiply
    888.88x = 1,334 × 478.36
  4. Step 4: Simplify right side
    888.88x = 638,132.24
  5. Step 5: Solve for x
    x = 638,132.24/888.88
  6. Step 6: Final answer
    x = 717.91

Related Problems

Find fourth proportional to 444.44, 667 and 239.18
Half scale
Find fourth proportional to 1,777.76, 2,668 and 956.72
Double scale
Find fourth proportional to 889.88, 1,335.50 and 479.36
Similar ratio
Find fourth proportional to 1,333.32, 2,001 and 717.54
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.