Home / 387,618-831,272

Finding the Third Proportional to 387,618 and 831,272

Calculator

Solution

The third proportional to 387,618 and 831,272 is: 1,782,716.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,618 : 831,272 = 831,272 : x
  2. Step 2: Convert to fraction form
    387,618/831,272 = 831,272/x
  3. Step 3: Cross multiply
    387,618x = 831,272 × 831,272
  4. Step 4: Simplify right side
    387,618x = 691,013,137,984
  5. Step 5: Solve for x
    x = 691,013,137,984/387,618
  6. Step 6: Final answer
    x = 1,782,716.84

Related Problems

Find third proportional to 193,809 and 415,636
Half scale
Find third proportional to 775,236 and 1,662,544
Double scale
Find third proportional to 387,620 and 831,276
Similar ratio
Find third proportional to 581,427 and 1,246,908
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.