Home / 205.02-307.50-171

Finding the Fourth Proportional to 205.02, 307.50 and 171

Calculator

Solution

The fourth proportional to 205.02, 307.50 and 171 is: 256.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.02 : 307.50 = 171 : x
  2. Step 2: Convert to fraction form
    205.02/307.50 = 171/x
  3. Step 3: Cross multiply
    205.02x = 307.50 × 171
  4. Step 4: Simplify right side
    205.02x = 52,582.50
  5. Step 5: Solve for x
    x = 52,582.50/205.02
  6. Step 6: Final answer
    x = 256.47

Related Problems

Find fourth proportional to 102.51, 153.75 and 85.50
Half scale
Find fourth proportional to 410.04, 615 and 342
Double scale
Find fourth proportional to 206.02, 309 and 172
Similar ratio
Find fourth proportional to 307.53, 461.25 and 256.50
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.