Home / 315,780-485,352

Finding the Third Proportional to 315,780 and 485,352

Calculator

Solution

The third proportional to 315,780 and 485,352 is: 745,983.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,780 : 485,352 = 485,352 : x
  2. Step 2: Convert to fraction form
    315,780/485,352 = 485,352/x
  3. Step 3: Cross multiply
    315,780x = 485,352 × 485,352
  4. Step 4: Simplify right side
    315,780x = 235,566,563,904
  5. Step 5: Solve for x
    x = 235,566,563,904/315,780
  6. Step 6: Final answer
    x = 745,983.17

Related Problems

Find third proportional to 157,890 and 242,676
Half scale
Find third proportional to 631,560 and 970,704
Double scale
Find third proportional to 315,782 and 485,355
Similar ratio
Find third proportional to 473,670 and 728,028
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.