Home / 319,656-689,124

Finding the Third Proportional to 319,656 and 689,124

Calculator

Solution

The third proportional to 319,656 and 689,124 is: 1,485,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,656 : 689,124 = 689,124 : x
  2. Step 2: Convert to fraction form
    319,656/689,124 = 689,124/x
  3. Step 3: Cross multiply
    319,656x = 689,124 × 689,124
  4. Step 4: Simplify right side
    319,656x = 474,891,887,376
  5. Step 5: Solve for x
    x = 474,891,887,376/319,656
  6. Step 6: Final answer
    x = 1,485,634.20

Related Problems

Find third proportional to 159,828 and 344,562
Half scale
Find third proportional to 639,312 and 1,378,248
Double scale
Find third proportional to 319,658 and 689,128
Similar ratio
Find third proportional to 479,484 and 1,033,686
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.