Home / 252.75-390.19

Finding the Third Proportional to 252.75 and 390.19

Calculator

Solution

The third proportional to 252.75 and 390.19 is: 602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.75 : 390.19 = 390.19 : x
  2. Step 2: Convert to fraction form
    252.75/390.19 = 390.19/x
  3. Step 3: Cross multiply
    252.75x = 390.19 × 390.19
  4. Step 4: Simplify right side
    252.75x = 152,246.29
  5. Step 5: Solve for x
    x = 152,246.29/252.75
  6. Step 6: Final answer
    x = 602.36

Related Problems

Find third proportional to 126.38 and 195.09
Half scale
Find third proportional to 505.50 and 780.38
Double scale
Find third proportional to 255 and 393
Similar ratio
Find third proportional to 379.13 and 585.28
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.