Home / 187.31-279.28

Finding the Third Proportional to 187.31 and 279.28

Calculator

Solution

The third proportional to 187.31 and 279.28 is: 416.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.31 : 279.28 = 279.28 : x
  2. Step 2: Convert to fraction form
    187.31/279.28 = 279.28/x
  3. Step 3: Cross multiply
    187.31x = 279.28 × 279.28
  4. Step 4: Simplify right side
    187.31x = 77,998.02
  5. Step 5: Solve for x
    x = 77,998.02/187.31
  6. Step 6: Final answer
    x = 416.41

Related Problems

Find third proportional to 93.66 and 139.64
Half scale
Find third proportional to 374.63 and 558.56
Double scale
Find third proportional to 189 and 282
Similar ratio
Find third proportional to 280.97 and 418.92
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.