Home / 218,730-312,784

Finding the Third Proportional to 218,730 and 312,784

Calculator

Solution

The third proportional to 218,730 and 312,784 is: 447,281.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,730 : 312,784 = 312,784 : x
  2. Step 2: Convert to fraction form
    218,730/312,784 = 312,784/x
  3. Step 3: Cross multiply
    218,730x = 312,784 × 312,784
  4. Step 4: Simplify right side
    218,730x = 97,833,830,656
  5. Step 5: Solve for x
    x = 97,833,830,656/218,730
  6. Step 6: Final answer
    x = 447,281.26

Related Problems

Find third proportional to 109,365 and 156,392
Half scale
Find third proportional to 437,460 and 625,568
Double scale
Find third proportional to 218,732 and 312,787
Similar ratio
Find third proportional to 328,095 and 469,176
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.