Home / 315,290-691,897

Finding the Third Proportional to 315,290 and 691,897

Calculator

Solution

The third proportional to 315,290 and 691,897 is: 1,518,352.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,290 : 691,897 = 691,897 : x
  2. Step 2: Convert to fraction form
    315,290/691,897 = 691,897/x
  3. Step 3: Cross multiply
    315,290x = 691,897 × 691,897
  4. Step 4: Simplify right side
    315,290x = 478,721,458,609
  5. Step 5: Solve for x
    x = 478,721,458,609/315,290
  6. Step 6: Final answer
    x = 1,518,352.81

Related Problems

Find third proportional to 157,645 and 345,948.50
Half scale
Find third proportional to 630,580 and 1,383,794
Double scale
Find third proportional to 315,292 and 691,901
Similar ratio
Find third proportional to 472,935 and 1,037,845.50
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.