Home / 781.60-1,077.84-606.88

Finding the Fourth Proportional to 781.60, 1,077.84 and 606.88

Calculator

Solution

The fourth proportional to 781.60, 1,077.84 and 606.88 is: 836.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    781.60 : 1,077.84 = 606.88 : x
  2. Step 2: Convert to fraction form
    781.60/1,077.84 = 606.88/x
  3. Step 3: Cross multiply
    781.60x = 1,077.84 × 606.88
  4. Step 4: Simplify right side
    781.60x = 654,119.54
  5. Step 5: Solve for x
    x = 654,119.54/781.60
  6. Step 6: Final answer
    x = 836.90

Related Problems

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.