Home / 435.38-551.81

Finding the Third Proportional to 435.38 and 551.81

Calculator

Solution

The third proportional to 435.38 and 551.81 is: 699.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.38 : 551.81 = 551.81 : x
  2. Step 2: Convert to fraction form
    435.38/551.81 = 551.81/x
  3. Step 3: Cross multiply
    435.38x = 551.81 × 551.81
  4. Step 4: Simplify right side
    435.38x = 304,497.04
  5. Step 5: Solve for x
    x = 304,497.04/435.38
  6. Step 6: Final answer
    x = 699.39

Related Problems

Find third proportional to 217.69 and 275.91
Half scale
Find third proportional to 870.75 and 1,103.63
Double scale
Find third proportional to 437 and 554
Similar ratio
Find third proportional to 653.06 and 827.72
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.