Home / 306,057.20-428,830-306,057.20

Finding the Fourth Proportional to 306,057.20, 428,830 and 306,057.20

Calculator

Solution

The fourth proportional to 306,057.20, 428,830 and 306,057.20 is: 428,830

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,057.20 : 428,830 = 306,057.20 : x
  2. Step 2: Convert to fraction form
    306,057.20/428,830 = 306,057.20/x
  3. Step 3: Cross multiply
    306,057.20x = 428,830 × 306,057.20
  4. Step 4: Simplify right side
    306,057.20x = 131,246,509,076
  5. Step 5: Solve for x
    x = 131,246,509,076/306,057.20
  6. Step 6: Final answer
    x = 428,830

Related Problems

Find fourth proportional to 153,028.60, 214,415 and 153,028.60
Half scale
Find fourth proportional to 612,114.40, 857,660 and 612,114.40
Double scale
Find fourth proportional to 306,058.20, 428,831.40 and 306,058.20
Similar ratio
Find fourth proportional to 459,085.80, 643,245 and 459,085.80
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.