Home / 478.64-718-190

Finding the Fourth Proportional to 478.64, 718 and 190

Calculator

Solution

The fourth proportional to 478.64, 718 and 190 is: 285.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.64 : 718 = 190 : x
  2. Step 2: Convert to fraction form
    478.64/718 = 190/x
  3. Step 3: Cross multiply
    478.64x = 718 × 190
  4. Step 4: Simplify right side
    478.64x = 136,420
  5. Step 5: Solve for x
    x = 136,420/478.64
  6. Step 6: Final answer
    x = 285.02

Related Problems

Find fourth proportional to 239.32, 359 and 95
Half scale
Find fourth proportional to 957.28, 1,436 and 380
Double scale
Find fourth proportional to 479.64, 719.50 and 191
Similar ratio
Find fourth proportional to 717.96, 1,077 and 285
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.