Home / 655.12-904-406.40

Finding the Fourth Proportional to 655.12, 904 and 406.40

Calculator

Solution

The fourth proportional to 655.12, 904 and 406.40 is: 560.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.12 : 904 = 406.40 : x
  2. Step 2: Convert to fraction form
    655.12/904 = 406.40/x
  3. Step 3: Cross multiply
    655.12x = 904 × 406.40
  4. Step 4: Simplify right side
    655.12x = 367,385.60
  5. Step 5: Solve for x
    x = 367,385.60/655.12
  6. Step 6: Final answer
    x = 560.79

Related Problems

Find fourth proportional to 327.56, 452 and 203.20
Half scale
Find fourth proportional to 1,310.24, 1,808 and 812.80
Double scale
Find fourth proportional to 656.12, 905.38 and 407.40
Similar ratio
Find fourth proportional to 982.68, 1,356 and 609.60
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.