Home / 388,580-617,880

Finding the Third Proportional to 388,580 and 617,880

Calculator

Solution

The third proportional to 388,580 and 617,880 is: 982,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,580 : 617,880 = 617,880 : x
  2. Step 2: Convert to fraction form
    388,580/617,880 = 617,880/x
  3. Step 3: Cross multiply
    388,580x = 617,880 × 617,880
  4. Step 4: Simplify right side
    388,580x = 381,775,694,400
  5. Step 5: Solve for x
    x = 381,775,694,400/388,580
  6. Step 6: Final answer
    x = 982,489.31

Related Problems

Find third proportional to 194,290 and 308,940
Half scale
Find third proportional to 777,160 and 1,235,760
Double scale
Find third proportional to 388,582 and 617,883
Similar ratio
Find third proportional to 582,870 and 926,820
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.