Home / 490,866-720,138

Finding the Third Proportional to 490,866 and 720,138

Calculator

Solution

The third proportional to 490,866 and 720,138 is: 1,056,497.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,866 : 720,138 = 720,138 : x
  2. Step 2: Convert to fraction form
    490,866/720,138 = 720,138/x
  3. Step 3: Cross multiply
    490,866x = 720,138 × 720,138
  4. Step 4: Simplify right side
    490,866x = 518,598,739,044
  5. Step 5: Solve for x
    x = 518,598,739,044/490,866
  6. Step 6: Final answer
    x = 1,056,497.58

Related Problems

Find third proportional to 245,433 and 360,069
Half scale
Find third proportional to 981,732 and 1,440,276
Double scale
Find third proportional to 490,868 and 720,141
Similar ratio
Find third proportional to 736,299 and 1,080,207
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.