Home / 359.72-496.31-217.90

Finding the Fourth Proportional to 359.72, 496.31 and 217.90

Calculator

Solution

The fourth proportional to 359.72, 496.31 and 217.90 is: 300.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.72 : 496.31 = 217.90 : x
  2. Step 2: Convert to fraction form
    359.72/496.31 = 217.90/x
  3. Step 3: Cross multiply
    359.72x = 496.31 × 217.90
  4. Step 4: Simplify right side
    359.72x = 108,145.95
  5. Step 5: Solve for x
    x = 108,145.95/359.72
  6. Step 6: Final answer
    x = 300.64

Related Problems

Find fourth proportional to 179.86, 248.16 and 108.95
Half scale
Find fourth proportional to 719.44, 992.62 and 435.80
Double scale
Find fourth proportional to 360.72, 497.69 and 218.90
Similar ratio
Find fourth proportional to 539.58, 744.47 and 326.85
1.5x scale

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.