Home / 919,105.92-1,378,659.36-420,120

Finding the Fourth Proportional to 919,105.92, 1,378,659.36 and 420,120

Calculator

Solution

The fourth proportional to 919,105.92, 1,378,659.36 and 420,120 is: 630,180.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,105.92 : 1,378,659.36 = 420,120 : x
  2. Step 2: Convert to fraction form
    919,105.92/1,378,659.36 = 420,120/x
  3. Step 3: Cross multiply
    919,105.92x = 1,378,659.36 × 420,120
  4. Step 4: Simplify right side
    919,105.92x = 579,202,370,323.20
  5. Step 5: Solve for x
    x = 579,202,370,323.20/919,105.92
  6. Step 6: Final answer
    x = 630,180.22

Related Problems

Find fourth proportional to 459,552.96, 689,329.68 and 210,060
Half scale
Find fourth proportional to 1,838,211.84, 2,757,318.72 and 840,240
Double scale
Find fourth proportional to 919,106.92, 1,378,660.86 and 420,121
Similar ratio
Find fourth proportional to 1,378,658.88, 2,067,989.04 and 630,180
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.