Home / 289,780-426,288

Finding the Third Proportional to 289,780 and 426,288

Calculator

Solution

The third proportional to 289,780 and 426,288 is: 627,101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,780 : 426,288 = 426,288 : x
  2. Step 2: Convert to fraction form
    289,780/426,288 = 426,288/x
  3. Step 3: Cross multiply
    289,780x = 426,288 × 426,288
  4. Step 4: Simplify right side
    289,780x = 181,721,458,944
  5. Step 5: Solve for x
    x = 181,721,458,944/289,780
  6. Step 6: Final answer
    x = 627,101.45

Related Problems

Find third proportional to 144,890 and 213,144
Half scale
Find third proportional to 579,560 and 852,576
Double scale
Find third proportional to 289,782 and 426,291
Similar ratio
Find third proportional to 434,670 and 639,432
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.