Home / 490.25-665.88

Finding the Third Proportional to 490.25 and 665.88

Calculator

Solution

The third proportional to 490.25 and 665.88 is: 904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.25 : 665.88 = 665.88 : x
  2. Step 2: Convert to fraction form
    490.25/665.88 = 665.88/x
  3. Step 3: Cross multiply
    490.25x = 665.88 × 665.88
  4. Step 4: Simplify right side
    490.25x = 443,389.52
  5. Step 5: Solve for x
    x = 443,389.52/490.25
  6. Step 6: Final answer
    x = 904.42

Related Problems

Find third proportional to 245.13 and 332.94
Half scale
Find third proportional to 980.50 and 1,331.75
Double scale
Find third proportional to 492 and 669
Similar ratio
Find third proportional to 735.38 and 998.81
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.