Home / 617.63-905.81

Finding the Third Proportional to 617.63 and 905.81

Calculator

Solution

The third proportional to 617.63 and 905.81 is: 1,328.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.63 : 905.81 = 905.81 : x
  2. Step 2: Convert to fraction form
    617.63/905.81 = 905.81/x
  3. Step 3: Cross multiply
    617.63x = 905.81 × 905.81
  4. Step 4: Simplify right side
    617.63x = 820,496.29
  5. Step 5: Solve for x
    x = 820,496.29/617.63
  6. Step 6: Final answer
    x = 1,328.47

Related Problems

Find third proportional to 308.81 and 452.91
Half scale
Find third proportional to 1,235.25 and 1,811.63
Double scale
Find third proportional to 620 and 909
Similar ratio
Find third proportional to 926.44 and 1,358.72
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.