Home / 405,830.40-605,812.80-356,064

Finding the Fourth Proportional to 405,830.40, 605,812.80 and 356,064

Calculator

Solution

The fourth proportional to 405,830.40, 605,812.80 and 356,064 is: 531,522.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,830.40 : 605,812.80 = 356,064 : x
  2. Step 2: Convert to fraction form
    405,830.40/605,812.80 = 356,064/x
  3. Step 3: Cross multiply
    405,830.40x = 605,812.80 × 356,064
  4. Step 4: Simplify right side
    405,830.40x = 215,708,128,819.20
  5. Step 5: Solve for x
    x = 215,708,128,819.20/405,830.40
  6. Step 6: Final answer
    x = 531,522.85

Related Problems

Find fourth proportional to 202,915.20, 302,906.40 and 178,032
Half scale
Find fourth proportional to 811,660.80, 1,211,625.60 and 712,128
Double scale
Find fourth proportional to 405,831.40, 605,814.29 and 356,065
Similar ratio
Find fourth proportional to 608,745.60, 908,719.20 and 534,096
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.