Home / 289,440-445,392

Finding the Third Proportional to 289,440 and 445,392

Calculator

Solution

The third proportional to 289,440 and 445,392 is: 685,371.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,440 : 445,392 = 445,392 : x
  2. Step 2: Convert to fraction form
    289,440/445,392 = 445,392/x
  3. Step 3: Cross multiply
    289,440x = 445,392 × 445,392
  4. Step 4: Simplify right side
    289,440x = 198,374,033,664
  5. Step 5: Solve for x
    x = 198,374,033,664/289,440
  6. Step 6: Final answer
    x = 685,371.87

Related Problems

Find third proportional to 144,720 and 222,696
Half scale
Find third proportional to 578,880 and 890,784
Double scale
Find third proportional to 289,442 and 445,395
Similar ratio
Find third proportional to 434,160 and 668,088
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.