Home / 130-249.50

Finding the Third Proportional to 130 and 249.50

Calculator

Solution

The third proportional to 130 and 249.50 is: 478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    130 : 249.50 = 249.50 : x
  2. Step 2: Convert to fraction form
    130/249.50 = 249.50/x
  3. Step 3: Cross multiply
    130x = 249.50 × 249.50
  4. Step 4: Simplify right side
    130x = 62,250.25
  5. Step 5: Solve for x
    x = 62,250.25/130
  6. Step 6: Final answer
    x = 478.85

Related Problems

Find third proportional to 65 and 124.75
Half scale
Find third proportional to 260 and 499
Double scale
Find third proportional to 132 and 253
Similar ratio
Find third proportional to 195 and 374.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.