Home / 147-317

Finding the Third Proportional to 147 and 317

Calculator

Solution

The third proportional to 147 and 317 is: 683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    147 : 317 = 317 : x
  2. Step 2: Convert to fraction form
    147/317 = 317/x
  3. Step 3: Cross multiply
    147x = 317 × 317
  4. Step 4: Simplify right side
    147x = 100,489
  5. Step 5: Solve for x
    x = 100,489/147
  6. Step 6: Final answer
    x = 683.60

Related Problems

Find third proportional to 73.50 and 158.50
Half scale
Find third proportional to 294 and 634
Double scale
Find third proportional to 149 and 321
Similar ratio
Find third proportional to 220.50 and 475.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.