Home / 296,280-643,140

Finding the Third Proportional to 296,280 and 643,140

Calculator

Solution

The third proportional to 296,280 and 643,140 is: 1,396,074.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,280 : 643,140 = 643,140 : x
  2. Step 2: Convert to fraction form
    296,280/643,140 = 643,140/x
  3. Step 3: Cross multiply
    296,280x = 643,140 × 643,140
  4. Step 4: Simplify right side
    296,280x = 413,629,059,600
  5. Step 5: Solve for x
    x = 413,629,059,600/296,280
  6. Step 6: Final answer
    x = 1,396,074.86

Related Problems

Find third proportional to 148,140 and 321,570
Half scale
Find third proportional to 592,560 and 1,286,280
Double scale
Find third proportional to 296,282 and 643,144
Similar ratio
Find third proportional to 444,420 and 964,710
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.