Home / 393.61-860.63

Finding the Third Proportional to 393.61 and 860.63

Calculator

Solution

The third proportional to 393.61 and 860.63 is: 1,881.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.61 : 860.63 = 860.63 : x
  2. Step 2: Convert to fraction form
    393.61/860.63 = 860.63/x
  3. Step 3: Cross multiply
    393.61x = 860.63 × 860.63
  4. Step 4: Simplify right side
    393.61x = 740,675.39
  5. Step 5: Solve for x
    x = 740,675.39/393.61
  6. Step 6: Final answer
    x = 1,881.75

Related Problems

Find third proportional to 196.80 and 430.31
Half scale
Find third proportional to 787.22 and 1,721.25
Double scale
Find third proportional to 396 and 865
Similar ratio
Find third proportional to 590.41 and 1,290.94
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.