Home / 266.06-390.09

Finding the Third Proportional to 266.06 and 390.09

Calculator

Solution

The third proportional to 266.06 and 390.09 is: 571.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.06 : 390.09 = 390.09 : x
  2. Step 2: Convert to fraction form
    266.06/390.09 = 390.09/x
  3. Step 3: Cross multiply
    266.06x = 390.09 × 390.09
  4. Step 4: Simplify right side
    266.06x = 152,173.13
  5. Step 5: Solve for x
    x = 152,173.13/266.06
  6. Step 6: Final answer
    x = 571.95

Related Problems

Find third proportional to 133.03 and 195.05
Half scale
Find third proportional to 532.13 and 780.19
Double scale
Find third proportional to 268 and 393
Similar ratio
Find third proportional to 399.09 and 585.14
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.