Home / 546.78-820.44-303.78

Finding the Fourth Proportional to 546.78, 820.44 and 303.78

Calculator

Solution

The fourth proportional to 546.78, 820.44 and 303.78 is: 455.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.78 : 820.44 = 303.78 : x
  2. Step 2: Convert to fraction form
    546.78/820.44 = 303.78/x
  3. Step 3: Cross multiply
    546.78x = 820.44 × 303.78
  4. Step 4: Simplify right side
    546.78x = 249,233.26
  5. Step 5: Solve for x
    x = 249,233.26/546.78
  6. Step 6: Final answer
    x = 455.82

Related Problems

Find fourth proportional to 273.39, 410.22 and 151.89
Half scale
Find fourth proportional to 1,093.56, 1,640.88 and 607.56
Double scale
Find fourth proportional to 547.78, 821.94 and 304.78
Similar ratio
Find fourth proportional to 820.17, 1,230.66 and 455.67
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.