Home / 604.31-905.22-278.69

Finding the Fourth Proportional to 604.31, 905.22 and 278.69

Calculator

Solution

The fourth proportional to 604.31, 905.22 and 278.69 is: 417.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.31 : 905.22 = 278.69 : x
  2. Step 2: Convert to fraction form
    604.31/905.22 = 278.69/x
  3. Step 3: Cross multiply
    604.31x = 905.22 × 278.69
  4. Step 4: Simplify right side
    604.31x = 252,271.24
  5. Step 5: Solve for x
    x = 252,271.24/604.31
  6. Step 6: Final answer
    x = 417.46

Related Problems

Find fourth proportional to 302.15, 452.61 and 139.34
Half scale
Find fourth proportional to 1,208.61, 1,810.44 and 557.37
Double scale
Find fourth proportional to 605.31, 906.72 and 279.69
Similar ratio
Find fourth proportional to 906.46, 1,357.83 and 418.03
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.