Home / 249-398.50

Finding the Third Proportional to 249 and 398.50

Calculator

Solution

The third proportional to 249 and 398.50 is: 637.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    249 : 398.50 = 398.50 : x
  2. Step 2: Convert to fraction form
    249/398.50 = 398.50/x
  3. Step 3: Cross multiply
    249x = 398.50 × 398.50
  4. Step 4: Simplify right side
    249x = 158,802.25
  5. Step 5: Solve for x
    x = 158,802.25/249
  6. Step 6: Final answer
    x = 637.76

Related Problems

Find third proportional to 124.50 and 199.25
Half scale
Find third proportional to 498 and 797
Double scale
Find third proportional to 251 and 402
Similar ratio
Find third proportional to 373.50 and 597.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.