Home / 291,480-428,885

Finding the Third Proportional to 291,480 and 428,885

Calculator

Solution

The third proportional to 291,480 and 428,885 is: 631,063.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,480 : 428,885 = 428,885 : x
  2. Step 2: Convert to fraction form
    291,480/428,885 = 428,885/x
  3. Step 3: Cross multiply
    291,480x = 428,885 × 428,885
  4. Step 4: Simplify right side
    291,480x = 183,942,343,225
  5. Step 5: Solve for x
    x = 183,942,343,225/291,480
  6. Step 6: Final answer
    x = 631,063.34

Related Problems

Find third proportional to 145,740 and 214,442.50
Half scale
Find third proportional to 582,960 and 857,770
Double scale
Find third proportional to 291,482 and 428,888
Similar ratio
Find third proportional to 437,220 and 643,327.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.