Home / 145,128-315,204

Finding the Third Proportional to 145,128 and 315,204

Calculator

Solution

The third proportional to 145,128 and 315,204 is: 684,592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,128 : 315,204 = 315,204 : x
  2. Step 2: Convert to fraction form
    145,128/315,204 = 315,204/x
  3. Step 3: Cross multiply
    145,128x = 315,204 × 315,204
  4. Step 4: Simplify right side
    145,128x = 99,353,561,616
  5. Step 5: Solve for x
    x = 99,353,561,616/145,128
  6. Step 6: Final answer
    x = 684,592.65

Related Problems

Find third proportional to 72,564 and 157,602
Half scale
Find third proportional to 290,256 and 630,408
Double scale
Find third proportional to 145,130 and 315,208
Similar ratio
Find third proportional to 217,692 and 472,806
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.