Home / 138,447-216,897

Finding the Third Proportional to 138,447 and 216,897

Calculator

Solution

The third proportional to 138,447 and 216,897 is: 339,800.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,447 : 216,897 = 216,897 : x
  2. Step 2: Convert to fraction form
    138,447/216,897 = 216,897/x
  3. Step 3: Cross multiply
    138,447x = 216,897 × 216,897
  4. Step 4: Simplify right side
    138,447x = 47,044,308,609
  5. Step 5: Solve for x
    x = 47,044,308,609/138,447
  6. Step 6: Final answer
    x = 339,800.13

Related Problems

Find third proportional to 69,223.50 and 108,448.50
Half scale
Find third proportional to 276,894 and 433,794
Double scale
Find third proportional to 138,449 and 216,900
Similar ratio
Find third proportional to 207,670.50 and 325,345.50
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.