Home / 421,138-921,007

Finding the Third Proportional to 421,138 and 921,007

Calculator

Solution

The third proportional to 421,138 and 921,007 is: 2,014,194.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,138 : 921,007 = 921,007 : x
  2. Step 2: Convert to fraction form
    421,138/921,007 = 921,007/x
  3. Step 3: Cross multiply
    421,138x = 921,007 × 921,007
  4. Step 4: Simplify right side
    421,138x = 848,253,894,049
  5. Step 5: Solve for x
    x = 848,253,894,049/421,138
  6. Step 6: Final answer
    x = 2,014,194.62

Related Problems

Find third proportional to 210,569 and 460,503.50
Half scale
Find third proportional to 842,276 and 1,842,014
Double scale
Find third proportional to 421,140 and 921,011
Similar ratio
Find third proportional to 631,707 and 1,381,510.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.