Home / 211.80-291.96-158.55

Finding the Fourth Proportional to 211.80, 291.96 and 158.55

Calculator

Solution

The fourth proportional to 211.80, 291.96 and 158.55 is: 218.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.80 : 291.96 = 158.55 : x
  2. Step 2: Convert to fraction form
    211.80/291.96 = 158.55/x
  3. Step 3: Cross multiply
    211.80x = 291.96 × 158.55
  4. Step 4: Simplify right side
    211.80x = 46,290.26
  5. Step 5: Solve for x
    x = 46,290.26/211.80
  6. Step 6: Final answer
    x = 218.56

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.