Home / 317,580-687,000

Finding the Third Proportional to 317,580 and 687,000

Calculator

Solution

The third proportional to 317,580 and 687,000 is: 1,486,142.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,580 : 687,000 = 687,000 : x
  2. Step 2: Convert to fraction form
    317,580/687,000 = 687,000/x
  3. Step 3: Cross multiply
    317,580x = 687,000 × 687,000
  4. Step 4: Simplify right side
    317,580x = 471,969,000,000
  5. Step 5: Solve for x
    x = 471,969,000,000/317,580
  6. Step 6: Final answer
    x = 1,486,142.07

Related Problems

Find third proportional to 158,790 and 343,500
Half scale
Find third proportional to 635,160 and 1,374,000
Double scale
Find third proportional to 317,582 and 687,004
Similar ratio
Find third proportional to 476,370 and 1,030,500
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.