Home / 325.50-688.50

Finding the Third Proportional to 325.50 and 688.50

Calculator

Solution

The third proportional to 325.50 and 688.50 is: 1,456.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.50 : 688.50 = 688.50 : x
  2. Step 2: Convert to fraction form
    325.50/688.50 = 688.50/x
  3. Step 3: Cross multiply
    325.50x = 688.50 × 688.50
  4. Step 4: Simplify right side
    325.50x = 474,032.25
  5. Step 5: Solve for x
    x = 474,032.25/325.50
  6. Step 6: Final answer
    x = 1,456.32

Related Problems

Find third proportional to 162.75 and 344.25
Half scale
Find third proportional to 651 and 1,377
Double scale
Find third proportional to 328 and 693
Similar ratio
Find third proportional to 488.25 and 1,032.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.