Home / 319,640-689,096

Finding the Third Proportional to 319,640 and 689,096

Calculator

Solution

The third proportional to 319,640 and 689,096 is: 1,485,587.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,640 : 689,096 = 689,096 : x
  2. Step 2: Convert to fraction form
    319,640/689,096 = 689,096/x
  3. Step 3: Cross multiply
    319,640x = 689,096 × 689,096
  4. Step 4: Simplify right side
    319,640x = 474,853,297,216
  5. Step 5: Solve for x
    x = 474,853,297,216/319,640
  6. Step 6: Final answer
    x = 1,485,587.84

Related Problems

Find third proportional to 159,820 and 344,548
Half scale
Find third proportional to 639,280 and 1,378,192
Double scale
Find third proportional to 319,642 and 689,100
Similar ratio
Find third proportional to 479,460 and 1,033,644
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.