Home / 237.88-328.28-139.65

Finding the Fourth Proportional to 237.88, 328.28 and 139.65

Calculator

Solution

The fourth proportional to 237.88, 328.28 and 139.65 is: 192.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.88 : 328.28 = 139.65 : x
  2. Step 2: Convert to fraction form
    237.88/328.28 = 139.65/x
  3. Step 3: Cross multiply
    237.88x = 328.28 × 139.65
  4. Step 4: Simplify right side
    237.88x = 45,844.30
  5. Step 5: Solve for x
    x = 45,844.30/237.88
  6. Step 6: Final answer
    x = 192.72

Related Problems

Find fourth proportional to 118.94, 164.14 and 69.83
Half scale
Find fourth proportional to 475.76, 656.56 and 279.30
Double scale
Find fourth proportional to 238.88, 329.66 and 140.65
Similar ratio
Find fourth proportional to 356.82, 492.42 and 209.48
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.