Home / 485-727-253.72

Finding the Fourth Proportional to 485, 727 and 253.72

Calculator

Solution

The fourth proportional to 485, 727 and 253.72 is: 380.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485 : 727 = 253.72 : x
  2. Step 2: Convert to fraction form
    485/727 = 253.72/x
  3. Step 3: Cross multiply
    485x = 727 × 253.72
  4. Step 4: Simplify right side
    485x = 184,454.44
  5. Step 5: Solve for x
    x = 184,454.44/485
  6. Step 6: Final answer
    x = 380.32

Related Problems

Find fourth proportional to 242.50, 363.50 and 126.86
Half scale
Find fourth proportional to 970, 1,454 and 507.44
Double scale
Find fourth proportional to 486, 728.50 and 254.72
Similar ratio
Find fourth proportional to 727.50, 1,090.50 and 380.58
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.