Home / 291,220-636,320

Finding the Third Proportional to 291,220 and 636,320

Calculator

Solution

The third proportional to 291,220 and 636,320 is: 1,390,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,220 : 636,320 = 636,320 : x
  2. Step 2: Convert to fraction form
    291,220/636,320 = 636,320/x
  3. Step 3: Cross multiply
    291,220x = 636,320 × 636,320
  4. Step 4: Simplify right side
    291,220x = 404,903,142,400
  5. Step 5: Solve for x
    x = 404,903,142,400/291,220
  6. Step 6: Final answer
    x = 1,390,368.60

Related Problems

Find third proportional to 145,610 and 318,160
Half scale
Find third proportional to 582,440 and 1,272,640
Double scale
Find third proportional to 291,222 and 636,324
Similar ratio
Find third proportional to 436,830 and 954,480
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.