Home / 319,536-489,000

Finding the Third Proportional to 319,536 and 489,000

Calculator

Solution

The third proportional to 319,536 and 489,000 is: 748,338.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,536 : 489,000 = 489,000 : x
  2. Step 2: Convert to fraction form
    319,536/489,000 = 489,000/x
  3. Step 3: Cross multiply
    319,536x = 489,000 × 489,000
  4. Step 4: Simplify right side
    319,536x = 239,121,000,000
  5. Step 5: Solve for x
    x = 239,121,000,000/319,536
  6. Step 6: Final answer
    x = 748,338.22

Related Problems

Find third proportional to 159,768 and 244,500
Half scale
Find third proportional to 639,072 and 978,000
Double scale
Find third proportional to 319,538 and 489,003
Similar ratio
Find third proportional to 479,304 and 733,500
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.