Home / 128,306-281,763

Finding the Third Proportional to 128,306 and 281,763

Calculator

Solution

The third proportional to 128,306 and 281,763 is: 618,758.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,306 : 281,763 = 281,763 : x
  2. Step 2: Convert to fraction form
    128,306/281,763 = 281,763/x
  3. Step 3: Cross multiply
    128,306x = 281,763 × 281,763
  4. Step 4: Simplify right side
    128,306x = 79,390,388,169
  5. Step 5: Solve for x
    x = 79,390,388,169/128,306
  6. Step 6: Final answer
    x = 618,758.19

Related Problems

Find third proportional to 64,153 and 140,881.50
Half scale
Find third proportional to 256,612 and 563,526
Double scale
Find third proportional to 128,308 and 281,767
Similar ratio
Find third proportional to 192,459 and 422,644.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.