Home / 278.50-317

Finding the Third Proportional to 278.50 and 317

Calculator

Solution

The third proportional to 278.50 and 317 is: 360.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.50 : 317 = 317 : x
  2. Step 2: Convert to fraction form
    278.50/317 = 317/x
  3. Step 3: Cross multiply
    278.50x = 317 × 317
  4. Step 4: Simplify right side
    278.50x = 100,489
  5. Step 5: Solve for x
    x = 100,489/278.50
  6. Step 6: Final answer
    x = 360.82

Related Problems

Find third proportional to 139.25 and 158.50
Half scale
Find third proportional to 557 and 634
Double scale
Find third proportional to 281 and 319
Similar ratio
Find third proportional to 417.75 and 475.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.