Home / 130,905-285,138

Finding the Third Proportional to 130,905 and 285,138

Calculator

Solution

The third proportional to 130,905 and 285,138 is: 621,089.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,905 : 285,138 = 285,138 : x
  2. Step 2: Convert to fraction form
    130,905/285,138 = 285,138/x
  3. Step 3: Cross multiply
    130,905x = 285,138 × 285,138
  4. Step 4: Simplify right side
    130,905x = 81,303,679,044
  5. Step 5: Solve for x
    x = 81,303,679,044/130,905
  6. Step 6: Final answer
    x = 621,089.18

Related Problems

Find third proportional to 65,452.50 and 142,569
Half scale
Find third proportional to 261,810 and 570,276
Double scale
Find third proportional to 130,907 and 285,142
Similar ratio
Find third proportional to 196,357.50 and 427,707
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.