Home / 130.78-183.09

Finding the Third Proportional to 130.78 and 183.09

Calculator

Solution

The third proportional to 130.78 and 183.09 is: 256.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.78 : 183.09 = 183.09 : x
  2. Step 2: Convert to fraction form
    130.78/183.09 = 183.09/x
  3. Step 3: Cross multiply
    130.78x = 183.09 × 183.09
  4. Step 4: Simplify right side
    130.78x = 33,523.32
  5. Step 5: Solve for x
    x = 33,523.32/130.78
  6. Step 6: Final answer
    x = 256.33

Related Problems

Find third proportional to 65.39 and 91.55
Half scale
Find third proportional to 261.56 and 366.19
Double scale
Find third proportional to 133 and 186
Similar ratio
Find third proportional to 196.17 and 274.64
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.