Home / 142,778-310,980

Finding the Third Proportional to 142,778 and 310,980

Calculator

Solution

The third proportional to 142,778 and 310,980 is: 677,335.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,778 : 310,980 = 310,980 : x
  2. Step 2: Convert to fraction form
    142,778/310,980 = 310,980/x
  3. Step 3: Cross multiply
    142,778x = 310,980 × 310,980
  4. Step 4: Simplify right side
    142,778x = 96,708,560,400
  5. Step 5: Solve for x
    x = 96,708,560,400/142,778
  6. Step 6: Final answer
    x = 677,335.17

Related Problems

Find third proportional to 71,389 and 155,490
Half scale
Find third proportional to 285,556 and 621,960
Double scale
Find third proportional to 142,780 and 310,984
Similar ratio
Find third proportional to 214,167 and 466,470
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.