Home / 287.63-620.25

Finding the Third Proportional to 287.63 and 620.25

Calculator

Solution

The third proportional to 287.63 and 620.25 is: 1,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.63 : 620.25 = 620.25 : x
  2. Step 2: Convert to fraction form
    287.63/620.25 = 620.25/x
  3. Step 3: Cross multiply
    287.63x = 620.25 × 620.25
  4. Step 4: Simplify right side
    287.63x = 384,710.06
  5. Step 5: Solve for x
    x = 384,710.06/287.63
  6. Step 6: Final answer
    x = 1,337.54

Related Problems

Find third proportional to 143.81 and 310.13
Half scale
Find third proportional to 575.25 and 1,240.50
Double scale
Find third proportional to 290 and 625
Similar ratio
Find third proportional to 431.44 and 930.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.