Home / 145,623-311,490

Finding the Third Proportional to 145,623 and 311,490

Calculator

Solution

The third proportional to 145,623 and 311,490 is: 666,282.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,623 : 311,490 = 311,490 : x
  2. Step 2: Convert to fraction form
    145,623/311,490 = 311,490/x
  3. Step 3: Cross multiply
    145,623x = 311,490 × 311,490
  4. Step 4: Simplify right side
    145,623x = 97,026,020,100
  5. Step 5: Solve for x
    x = 97,026,020,100/145,623
  6. Step 6: Final answer
    x = 666,282.25

Related Problems

Find third proportional to 72,811.50 and 155,745
Half scale
Find third proportional to 291,246 and 622,980
Double scale
Find third proportional to 145,625 and 311,494
Similar ratio
Find third proportional to 218,434.50 and 467,235
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.