Home / 435-640.50

Finding the Third Proportional to 435 and 640.50

Calculator

Solution

The third proportional to 435 and 640.50 is: 943.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    435 : 640.50 = 640.50 : x
  2. Step 2: Convert to fraction form
    435/640.50 = 640.50/x
  3. Step 3: Cross multiply
    435x = 640.50 × 640.50
  4. Step 4: Simplify right side
    435x = 410,240.25
  5. Step 5: Solve for x
    x = 410,240.25/435
  6. Step 6: Final answer
    x = 943.08

Related Problems

Find third proportional to 217.50 and 320.25
Half scale
Find third proportional to 870 and 1,281
Double scale
Find third proportional to 437 and 643
Similar ratio
Find third proportional to 652.50 and 960.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.