Home / 218,040-328,140

Finding the Third Proportional to 218,040 and 328,140

Calculator

Solution

The third proportional to 218,040 and 328,140 is: 493,835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,040 : 328,140 = 328,140 : x
  2. Step 2: Convert to fraction form
    218,040/328,140 = 328,140/x
  3. Step 3: Cross multiply
    218,040x = 328,140 × 328,140
  4. Step 4: Simplify right side
    218,040x = 107,675,859,600
  5. Step 5: Solve for x
    x = 107,675,859,600/218,040
  6. Step 6: Final answer
    x = 493,835.35

Related Problems

Find third proportional to 109,020 and 164,070
Half scale
Find third proportional to 436,080 and 656,280
Double scale
Find third proportional to 218,042 and 328,143
Similar ratio
Find third proportional to 327,060 and 492,210
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.