Home / 328.50-487.13

Finding the Third Proportional to 328.50 and 487.13

Calculator

Solution

The third proportional to 328.50 and 487.13 is: 722.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.50 : 487.13 = 487.13 : x
  2. Step 2: Convert to fraction form
    328.50/487.13 = 487.13/x
  3. Step 3: Cross multiply
    328.50x = 487.13 × 487.13
  4. Step 4: Simplify right side
    328.50x = 237,290.77
  5. Step 5: Solve for x
    x = 237,290.77/328.50
  6. Step 6: Final answer
    x = 722.35

Related Problems

Find third proportional to 164.25 and 243.56
Half scale
Find third proportional to 657 and 974.25
Double scale
Find third proportional to 331 and 490
Similar ratio
Find third proportional to 492.75 and 730.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.