Home / 1,143.48-1,714.26-459

Finding the Fourth Proportional to 1,143.48, 1,714.26 and 459

Calculator

Solution

The fourth proportional to 1,143.48, 1,714.26 and 459 is: 688.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.48 : 1,714.26 = 459 : x
  2. Step 2: Convert to fraction form
    1,143.48/1,714.26 = 459/x
  3. Step 3: Cross multiply
    1,143.48x = 1,714.26 × 459
  4. Step 4: Simplify right side
    1,143.48x = 786,845.34
  5. Step 5: Solve for x
    x = 786,845.34/1,143.48
  6. Step 6: Final answer
    x = 688.11

Related Problems

Find fourth proportional to 571.74, 857.13 and 229.50
Half scale
Find fourth proportional to 2,286.96, 3,428.52 and 918
Double scale
Find fourth proportional to 1,144.48, 1,715.76 and 460
Similar ratio
Find fourth proportional to 1,715.22, 2,571.39 and 688.50
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.