Home / 308,974.50-438,129

Finding the Third Proportional to 308,974.50 and 438,129

Calculator

Solution

The third proportional to 308,974.50 and 438,129 is: 621,271.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,974.50 : 438,129 = 438,129 : x
  2. Step 2: Convert to fraction form
    308,974.50/438,129 = 438,129/x
  3. Step 3: Cross multiply
    308,974.50x = 438,129 × 438,129
  4. Step 4: Simplify right side
    308,974.50x = 191,957,020,641
  5. Step 5: Solve for x
    x = 191,957,020,641/308,974.50
  6. Step 6: Final answer
    x = 621,271.40

Related Problems

Find third proportional to 154,487.25 and 219,064.50
Half scale
Find third proportional to 617,949 and 876,258
Double scale
Find third proportional to 308,977 and 438,132
Similar ratio
Find third proportional to 463,461.75 and 657,193.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.