Home / 128,598-278,580

Finding the Third Proportional to 128,598 and 278,580

Calculator

Solution

The third proportional to 128,598 and 278,580 is: 603,483.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,598 : 278,580 = 278,580 : x
  2. Step 2: Convert to fraction form
    128,598/278,580 = 278,580/x
  3. Step 3: Cross multiply
    128,598x = 278,580 × 278,580
  4. Step 4: Simplify right side
    128,598x = 77,606,816,400
  5. Step 5: Solve for x
    x = 77,606,816,400/128,598
  6. Step 6: Final answer
    x = 603,483.85

Related Problems

Find third proportional to 64,299 and 139,290
Half scale
Find third proportional to 257,196 and 557,160
Double scale
Find third proportional to 128,600 and 278,584
Similar ratio
Find third proportional to 192,897 and 417,870
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.