Home / 239,688-521,640

Finding the Third Proportional to 239,688 and 521,640

Calculator

Solution

The third proportional to 239,688 and 521,640 is: 1,135,260.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,688 : 521,640 = 521,640 : x
  2. Step 2: Convert to fraction form
    239,688/521,640 = 521,640/x
  3. Step 3: Cross multiply
    239,688x = 521,640 × 521,640
  4. Step 4: Simplify right side
    239,688x = 272,108,289,600
  5. Step 5: Solve for x
    x = 272,108,289,600/239,688
  6. Step 6: Final answer
    x = 1,135,260.38

Related Problems

Find third proportional to 119,844 and 260,820
Half scale
Find third proportional to 479,376 and 1,043,280
Double scale
Find third proportional to 239,690 and 521,644
Similar ratio
Find third proportional to 359,532 and 782,460
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.