Home / 486.75-669.38

Finding the Third Proportional to 486.75 and 669.38

Calculator

Solution

The third proportional to 486.75 and 669.38 is: 920.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.75 : 669.38 = 669.38 : x
  2. Step 2: Convert to fraction form
    486.75/669.38 = 669.38/x
  3. Step 3: Cross multiply
    486.75x = 669.38 × 669.38
  4. Step 4: Simplify right side
    486.75x = 448,062.89
  5. Step 5: Solve for x
    x = 448,062.89/486.75
  6. Step 6: Final answer
    x = 920.52

Related Problems

Find third proportional to 243.38 and 334.69
Half scale
Find third proportional to 973.50 and 1,338.75
Double scale
Find third proportional to 489 and 672
Similar ratio
Find third proportional to 730.13 and 1,004.06
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.