Home / 315,650-689,540

Finding the Third Proportional to 315,650 and 689,540

Calculator

Solution

The third proportional to 315,650 and 689,540 is: 1,506,305.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,650 : 689,540 = 689,540 : x
  2. Step 2: Convert to fraction form
    315,650/689,540 = 689,540/x
  3. Step 3: Cross multiply
    315,650x = 689,540 × 689,540
  4. Step 4: Simplify right side
    315,650x = 475,465,411,600
  5. Step 5: Solve for x
    x = 475,465,411,600/315,650
  6. Step 6: Final answer
    x = 1,506,305.76

Related Problems

Find third proportional to 157,825 and 344,770
Half scale
Find third proportional to 631,300 and 1,379,080
Double scale
Find third proportional to 315,652 and 689,544
Similar ratio
Find third proportional to 473,475 and 1,034,310
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.