Home / 428,077.80-642,116.70-218,125.80

Finding the Fourth Proportional to 428,077.80, 642,116.70 and 218,125.80

Calculator

Solution

The fourth proportional to 428,077.80, 642,116.70 and 218,125.80 is: 327,188.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,077.80 : 642,116.70 = 218,125.80 : x
  2. Step 2: Convert to fraction form
    428,077.80/642,116.70 = 218,125.80/x
  3. Step 3: Cross multiply
    428,077.80x = 642,116.70 × 218,125.80
  4. Step 4: Simplify right side
    428,077.80x = 140,062,218,880.86
  5. Step 5: Solve for x
    x = 140,062,218,880.86/428,077.80
  6. Step 6: Final answer
    x = 327,188.70

Related Problems

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.