Home / 273.38-421.45

Finding the Third Proportional to 273.38 and 421.45

Calculator

Solution

The third proportional to 273.38 and 421.45 is: 649.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.38 : 421.45 = 421.45 : x
  2. Step 2: Convert to fraction form
    273.38/421.45 = 421.45/x
  3. Step 3: Cross multiply
    273.38x = 421.45 × 421.45
  4. Step 4: Simplify right side
    273.38x = 177,622.74
  5. Step 5: Solve for x
    x = 177,622.74/273.38
  6. Step 6: Final answer
    x = 649.74

Related Problems

Find third proportional to 136.69 and 210.73
Half scale
Find third proportional to 546.75 and 842.91
Double scale
Find third proportional to 275 and 425
Similar ratio
Find third proportional to 410.06 and 632.18
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.