Home / 641.78-885.77-379.94

Finding the Fourth Proportional to 641.78, 885.77 and 379.94

Calculator

Solution

The fourth proportional to 641.78, 885.77 and 379.94 is: 524.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.78 : 885.77 = 379.94 : x
  2. Step 2: Convert to fraction form
    641.78/885.77 = 379.94/x
  3. Step 3: Cross multiply
    641.78x = 885.77 × 379.94
  4. Step 4: Simplify right side
    641.78x = 336,539.45
  5. Step 5: Solve for x
    x = 336,539.45/641.78
  6. Step 6: Final answer
    x = 524.38

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.