Home / 448-487

Finding the Third Proportional to 448 and 487

Calculator

Solution

The third proportional to 448 and 487 is: 529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    448 : 487 = 487 : x
  2. Step 2: Convert to fraction form
    448/487 = 487/x
  3. Step 3: Cross multiply
    448x = 487 × 487
  4. Step 4: Simplify right side
    448x = 237,169
  5. Step 5: Solve for x
    x = 237,169/448
  6. Step 6: Final answer
    x = 529.40

Related Problems

Find third proportional to 224 and 243.50
Half scale
Find third proportional to 896 and 974
Double scale
Find third proportional to 450 and 489
Similar ratio
Find third proportional to 672 and 730.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.