Home / 485.75-728.75

Finding the Third Proportional to 485.75 and 728.75

Calculator

Solution

The third proportional to 485.75 and 728.75 is: 1,093.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.75 : 728.75 = 728.75 : x
  2. Step 2: Convert to fraction form
    485.75/728.75 = 728.75/x
  3. Step 3: Cross multiply
    485.75x = 728.75 × 728.75
  4. Step 4: Simplify right side
    485.75x = 531,076.56
  5. Step 5: Solve for x
    x = 531,076.56/485.75
  6. Step 6: Final answer
    x = 1,093.31

Related Problems

Find third proportional to 242.88 and 364.38
Half scale
Find third proportional to 971.50 and 1,457.50
Double scale
Find third proportional to 488 and 732
Similar ratio
Find third proportional to 728.63 and 1,093.13
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.