Home / 353.75-520.50

Finding the Third Proportional to 353.75 and 520.50

Calculator

Solution

The third proportional to 353.75 and 520.50 is: 765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.75 : 520.50 = 520.50 : x
  2. Step 2: Convert to fraction form
    353.75/520.50 = 520.50/x
  3. Step 3: Cross multiply
    353.75x = 520.50 × 520.50
  4. Step 4: Simplify right side
    353.75x = 270,920.25
  5. Step 5: Solve for x
    x = 270,920.25/353.75
  6. Step 6: Final answer
    x = 765.85

Related Problems

Find third proportional to 176.88 and 260.25
Half scale
Find third proportional to 707.50 and 1,041
Double scale
Find third proportional to 356 and 523
Similar ratio
Find third proportional to 530.63 and 780.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.