Home / 315,309-489,573

Finding the Third Proportional to 315,309 and 489,573

Calculator

Solution

The third proportional to 315,309 and 489,573 is: 760,148.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,309 : 489,573 = 489,573 : x
  2. Step 2: Convert to fraction form
    315,309/489,573 = 489,573/x
  3. Step 3: Cross multiply
    315,309x = 489,573 × 489,573
  4. Step 4: Simplify right side
    315,309x = 239,681,722,329
  5. Step 5: Solve for x
    x = 239,681,722,329/315,309
  6. Step 6: Final answer
    x = 760,148.69

Related Problems

Find third proportional to 157,654.50 and 244,786.50
Half scale
Find third proportional to 630,618 and 979,146
Double scale
Find third proportional to 315,311 and 489,576
Similar ratio
Find third proportional to 472,963.50 and 734,359.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.