Home / 363.74-501.30-311.90

Finding the Fourth Proportional to 363.74, 501.30 and 311.90

Calculator

Solution

The fourth proportional to 363.74, 501.30 and 311.90 is: 429.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.74 : 501.30 = 311.90 : x
  2. Step 2: Convert to fraction form
    363.74/501.30 = 311.90/x
  3. Step 3: Cross multiply
    363.74x = 501.30 × 311.90
  4. Step 4: Simplify right side
    363.74x = 156,352.96
  5. Step 5: Solve for x
    x = 156,352.96/363.74
  6. Step 6: Final answer
    x = 429.85

Related Problems

Find fourth proportional to 181.87, 250.65 and 155.95
Half scale
Find fourth proportional to 727.47, 1,002.60 and 623.79
Double scale
Find fourth proportional to 364.74, 502.68 and 312.90
Similar ratio
Find fourth proportional to 545.60, 751.95 and 467.84
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.