Home / 359.40-538.86-185.74

Finding the Fourth Proportional to 359.40, 538.86 and 185.74

Calculator

Solution

The fourth proportional to 359.40, 538.86 and 185.74 is: 278.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.40 : 538.86 = 185.74 : x
  2. Step 2: Convert to fraction form
    359.40/538.86 = 185.74/x
  3. Step 3: Cross multiply
    359.40x = 538.86 × 185.74
  4. Step 4: Simplify right side
    359.40x = 100,087.86
  5. Step 5: Solve for x
    x = 100,087.86/359.40
  6. Step 6: Final answer
    x = 278.49

Related Problems

Find fourth proportional to 179.70, 269.43 and 92.87
Half scale
Find fourth proportional to 718.80, 1,077.72 and 371.48
Double scale
Find fourth proportional to 360.40, 540.36 and 186.74
Similar ratio
Find fourth proportional to 539.10, 808.29 and 278.61
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.