Home / 355.50-480

Finding the Third Proportional to 355.50 and 480

Calculator

Solution

The third proportional to 355.50 and 480 is: 648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.50 : 480 = 480 : x
  2. Step 2: Convert to fraction form
    355.50/480 = 480/x
  3. Step 3: Cross multiply
    355.50x = 480 × 480
  4. Step 4: Simplify right side
    355.50x = 230,400
  5. Step 5: Solve for x
    x = 230,400/355.50
  6. Step 6: Final answer
    x = 648.10

Related Problems

Find third proportional to 177.75 and 240
Half scale
Find third proportional to 711 and 960
Double scale
Find third proportional to 358 and 483
Similar ratio
Find third proportional to 533.25 and 720
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.