Home / 313,331-643,253

Finding the Third Proportional to 313,331 and 643,253

Calculator

Solution

The third proportional to 313,331 and 643,253 is: 1,320,566.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,331 : 643,253 = 643,253 : x
  2. Step 2: Convert to fraction form
    313,331/643,253 = 643,253/x
  3. Step 3: Cross multiply
    313,331x = 643,253 × 643,253
  4. Step 4: Simplify right side
    313,331x = 413,774,422,009
  5. Step 5: Solve for x
    x = 413,774,422,009/313,331
  6. Step 6: Final answer
    x = 1,320,566.50

Related Problems

Find third proportional to 156,665.50 and 321,626.50
Half scale
Find third proportional to 626,662 and 1,286,506
Double scale
Find third proportional to 313,333 and 643,257
Similar ratio
Find third proportional to 469,996.50 and 964,879.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.