Home / 305.90-422.86-236.30

Finding the Fourth Proportional to 305.90, 422.86 and 236.30

Calculator

Solution

The fourth proportional to 305.90, 422.86 and 236.30 is: 326.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.90 : 422.86 = 236.30 : x
  2. Step 2: Convert to fraction form
    305.90/422.86 = 236.30/x
  3. Step 3: Cross multiply
    305.90x = 422.86 × 236.30
  4. Step 4: Simplify right side
    305.90x = 99,921.82
  5. Step 5: Solve for x
    x = 99,921.82/305.90
  6. Step 6: Final answer
    x = 326.65

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.