Home / 319,664-689,188

Finding the Third Proportional to 319,664 and 689,188

Calculator

Solution

The third proportional to 319,664 and 689,188 is: 1,485,872.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,664 : 689,188 = 689,188 : x
  2. Step 2: Convert to fraction form
    319,664/689,188 = 689,188/x
  3. Step 3: Cross multiply
    319,664x = 689,188 × 689,188
  4. Step 4: Simplify right side
    319,664x = 474,980,099,344
  5. Step 5: Solve for x
    x = 474,980,099,344/319,664
  6. Step 6: Final answer
    x = 1,485,872.98

Related Problems

Find third proportional to 159,832 and 344,594
Half scale
Find third proportional to 639,328 and 1,378,376
Double scale
Find third proportional to 319,666 and 689,192
Similar ratio
Find third proportional to 479,496 and 1,033,782
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.