Home / 719.94-1,080-354.72

Finding the Fourth Proportional to 719.94, 1,080 and 354.72

Calculator

Solution

The fourth proportional to 719.94, 1,080 and 354.72 is: 532.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.94 : 1,080 = 354.72 : x
  2. Step 2: Convert to fraction form
    719.94/1,080 = 354.72/x
  3. Step 3: Cross multiply
    719.94x = 1,080 × 354.72
  4. Step 4: Simplify right side
    719.94x = 383,097.60
  5. Step 5: Solve for x
    x = 383,097.60/719.94
  6. Step 6: Final answer
    x = 532.12

Related Problems

Find fourth proportional to 359.97, 540 and 177.36
Half scale
Find fourth proportional to 1,439.88, 2,160 and 709.44
Double scale
Find fourth proportional to 720.94, 1,081.50 and 355.72
Similar ratio
Find fourth proportional to 1,079.91, 1,620 and 532.08
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.