Home / 271,309-399,120

Finding the Third Proportional to 271,309 and 399,120

Calculator

Solution

The third proportional to 271,309 and 399,120 is: 587,141.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,309 : 399,120 = 399,120 : x
  2. Step 2: Convert to fraction form
    271,309/399,120 = 399,120/x
  3. Step 3: Cross multiply
    271,309x = 399,120 × 399,120
  4. Step 4: Simplify right side
    271,309x = 159,296,774,400
  5. Step 5: Solve for x
    x = 159,296,774,400/271,309
  6. Step 6: Final answer
    x = 587,141.50

Related Problems

Find third proportional to 135,654.50 and 199,560
Half scale
Find third proportional to 542,618 and 798,240
Double scale
Find third proportional to 271,311 and 399,123
Similar ratio
Find third proportional to 406,963.50 and 598,680
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.