Home / 437.63-687.38

Finding the Third Proportional to 437.63 and 687.38

Calculator

Solution

The third proportional to 437.63 and 687.38 is: 1,079.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.63 : 687.38 = 687.38 : x
  2. Step 2: Convert to fraction form
    437.63/687.38 = 687.38/x
  3. Step 3: Cross multiply
    437.63x = 687.38 × 687.38
  4. Step 4: Simplify right side
    437.63x = 472,484.39
  5. Step 5: Solve for x
    x = 472,484.39/437.63
  6. Step 6: Final answer
    x = 1,079.66

Related Problems

Find third proportional to 218.81 and 343.69
Half scale
Find third proportional to 875.25 and 1,374.75
Double scale
Find third proportional to 440 and 691
Similar ratio
Find third proportional to 656.44 and 1,031.06
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.