Home / 310,560-665,440

Finding the Third Proportional to 310,560 and 665,440

Calculator

Solution

The third proportional to 310,560 and 665,440 is: 1,425,844.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,560 : 665,440 = 665,440 : x
  2. Step 2: Convert to fraction form
    310,560/665,440 = 665,440/x
  3. Step 3: Cross multiply
    310,560x = 665,440 × 665,440
  4. Step 4: Simplify right side
    310,560x = 442,810,393,600
  5. Step 5: Solve for x
    x = 442,810,393,600/310,560
  6. Step 6: Final answer
    x = 1,425,844.90

Related Problems

Find third proportional to 155,280 and 332,720
Half scale
Find third proportional to 621,120 and 1,330,880
Double scale
Find third proportional to 310,562 and 665,444
Similar ratio
Find third proportional to 465,840 and 998,160
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.