Home / 218,700-342,630

Finding the Third Proportional to 218,700 and 342,630

Calculator

Solution

The third proportional to 218,700 and 342,630 is: 536,787

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,700 : 342,630 = 342,630 : x
  2. Step 2: Convert to fraction form
    218,700/342,630 = 342,630/x
  3. Step 3: Cross multiply
    218,700x = 342,630 × 342,630
  4. Step 4: Simplify right side
    218,700x = 117,395,316,900
  5. Step 5: Solve for x
    x = 117,395,316,900/218,700
  6. Step 6: Final answer
    x = 536,787

Related Problems

Find third proportional to 109,350 and 171,315
Half scale
Find third proportional to 437,400 and 685,260
Double scale
Find third proportional to 218,702 and 342,633
Similar ratio
Find third proportional to 328,050 and 513,945
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.