Home / 310,778-680,614

Finding the Third Proportional to 310,778 and 680,614

Calculator

Solution

The third proportional to 310,778 and 680,614 is: 1,490,566.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,778 : 680,614 = 680,614 : x
  2. Step 2: Convert to fraction form
    310,778/680,614 = 680,614/x
  3. Step 3: Cross multiply
    310,778x = 680,614 × 680,614
  4. Step 4: Simplify right side
    310,778x = 463,235,416,996
  5. Step 5: Solve for x
    x = 463,235,416,996/310,778
  6. Step 6: Final answer
    x = 1,490,566.95

Related Problems

Find third proportional to 155,389 and 340,307
Half scale
Find third proportional to 621,556 and 1,361,228
Double scale
Find third proportional to 310,780 and 680,618
Similar ratio
Find third proportional to 466,167 and 1,020,921
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.