Home / 257-384.80-195.96

Finding the Fourth Proportional to 257, 384.80 and 195.96

Calculator

Solution

The fourth proportional to 257, 384.80 and 195.96 is: 293.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    257 : 384.80 = 195.96 : x
  2. Step 2: Convert to fraction form
    257/384.80 = 195.96/x
  3. Step 3: Cross multiply
    257x = 384.80 × 195.96
  4. Step 4: Simplify right side
    257x = 75,405.41
  5. Step 5: Solve for x
    x = 75,405.41/257
  6. Step 6: Final answer
    x = 293.41

Related Problems

Find fourth proportional to 128.50, 192.40 and 97.98
Half scale
Find fourth proportional to 514, 769.60 and 391.92
Double scale
Find fourth proportional to 258, 386.30 and 196.96
Similar ratio
Find fourth proportional to 385.50, 577.20 and 293.94
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.