Home / 401-485.50

Finding the Third Proportional to 401 and 485.50

Calculator

Solution

The third proportional to 401 and 485.50 is: 587.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    401 : 485.50 = 485.50 : x
  2. Step 2: Convert to fraction form
    401/485.50 = 485.50/x
  3. Step 3: Cross multiply
    401x = 485.50 × 485.50
  4. Step 4: Simplify right side
    401x = 235,710.25
  5. Step 5: Solve for x
    x = 235,710.25/401
  6. Step 6: Final answer
    x = 587.81

Related Problems

Find third proportional to 200.50 and 242.75
Half scale
Find third proportional to 802 and 971
Double scale
Find third proportional to 403 and 488
Similar ratio
Find third proportional to 601.50 and 728.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.