Home / 283-638

Finding the Third Proportional to 283 and 638

Calculator

Solution

The third proportional to 283 and 638 is: 1,438.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    283 : 638 = 638 : x
  2. Step 2: Convert to fraction form
    283/638 = 638/x
  3. Step 3: Cross multiply
    283x = 638 × 638
  4. Step 4: Simplify right side
    283x = 407,044
  5. Step 5: Solve for x
    x = 407,044/283
  6. Step 6: Final answer
    x = 1,438.32

Related Problems

Find third proportional to 141.50 and 319
Half scale
Find third proportional to 566 and 1,276
Double scale
Find third proportional to 285 and 643
Similar ratio
Find third proportional to 424.50 and 957
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.