Home / 317.50-673.50

Finding the Third Proportional to 317.50 and 673.50

Calculator

Solution

The third proportional to 317.50 and 673.50 is: 1,428.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.50 : 673.50 = 673.50 : x
  2. Step 2: Convert to fraction form
    317.50/673.50 = 673.50/x
  3. Step 3: Cross multiply
    317.50x = 673.50 × 673.50
  4. Step 4: Simplify right side
    317.50x = 453,602.25
  5. Step 5: Solve for x
    x = 453,602.25/317.50
  6. Step 6: Final answer
    x = 1,428.67

Related Problems

Find third proportional to 158.75 and 336.75
Half scale
Find third proportional to 635 and 1,347
Double scale
Find third proportional to 320 and 678
Similar ratio
Find third proportional to 476.25 and 1,010.25
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.