Home / 421,386-918,516

Finding the Third Proportional to 421,386 and 918,516

Calculator

Solution

The third proportional to 421,386 and 918,516 is: 2,002,134.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,386 : 918,516 = 918,516 : x
  2. Step 2: Convert to fraction form
    421,386/918,516 = 918,516/x
  3. Step 3: Cross multiply
    421,386x = 918,516 × 918,516
  4. Step 4: Simplify right side
    421,386x = 843,671,642,256
  5. Step 5: Solve for x
    x = 843,671,642,256/421,386
  6. Step 6: Final answer
    x = 2,002,134.96

Related Problems

Find third proportional to 210,693 and 459,258
Half scale
Find third proportional to 842,772 and 1,837,032
Double scale
Find third proportional to 421,388 and 918,520
Similar ratio
Find third proportional to 632,079 and 1,377,774
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.