Home / 319,987-685,517

Finding the Third Proportional to 319,987 and 685,517

Calculator

Solution

The third proportional to 319,987 and 685,517 is: 1,468,602.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,987 : 685,517 = 685,517 : x
  2. Step 2: Convert to fraction form
    319,987/685,517 = 685,517/x
  3. Step 3: Cross multiply
    319,987x = 685,517 × 685,517
  4. Step 4: Simplify right side
    319,987x = 469,933,557,289
  5. Step 5: Solve for x
    x = 469,933,557,289/319,987
  6. Step 6: Final answer
    x = 1,468,602.03

Related Problems

Find third proportional to 159,993.50 and 342,758.50
Half scale
Find third proportional to 639,974 and 1,371,034
Double scale
Find third proportional to 319,989 and 685,521
Similar ratio
Find third proportional to 479,980.50 and 1,028,275.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.