Home / 211,636-287,424

Finding the Third Proportional to 211,636 and 287,424

Calculator

Solution

The third proportional to 211,636 and 287,424 is: 390,352.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,636 : 287,424 = 287,424 : x
  2. Step 2: Convert to fraction form
    211,636/287,424 = 287,424/x
  3. Step 3: Cross multiply
    211,636x = 287,424 × 287,424
  4. Step 4: Simplify right side
    211,636x = 82,612,555,776
  5. Step 5: Solve for x
    x = 82,612,555,776/211,636
  6. Step 6: Final answer
    x = 390,352.09

Related Problems

Find third proportional to 105,818 and 143,712
Half scale
Find third proportional to 423,272 and 574,848
Double scale
Find third proportional to 211,638 and 287,427
Similar ratio
Find third proportional to 317,454 and 431,136
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.