Home / 445,360-689,680

Finding the Third Proportional to 445,360 and 689,680

Calculator

Solution

The third proportional to 445,360 and 689,680 is: 1,068,031.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,360 : 689,680 = 689,680 : x
  2. Step 2: Convert to fraction form
    445,360/689,680 = 689,680/x
  3. Step 3: Cross multiply
    445,360x = 689,680 × 689,680
  4. Step 4: Simplify right side
    445,360x = 475,658,502,400
  5. Step 5: Solve for x
    x = 475,658,502,400/445,360
  6. Step 6: Final answer
    x = 1,068,031.49

Related Problems

Find third proportional to 222,680 and 344,840
Half scale
Find third proportional to 890,720 and 1,379,360
Double scale
Find third proportional to 445,362 and 689,683
Similar ratio
Find third proportional to 668,040 and 1,034,520
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.