Home / 879.68-1,213.86-486.68

Finding the Fourth Proportional to 879.68, 1,213.86 and 486.68

Calculator

Solution

The fourth proportional to 879.68, 1,213.86 and 486.68 is: 671.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.68 : 1,213.86 = 486.68 : x
  2. Step 2: Convert to fraction form
    879.68/1,213.86 = 486.68/x
  3. Step 3: Cross multiply
    879.68x = 1,213.86 × 486.68
  4. Step 4: Simplify right side
    879.68x = 590,764.42
  5. Step 5: Solve for x
    x = 590,764.42/879.68
  6. Step 6: Final answer
    x = 671.57

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.