Home / 688-917

Finding the Third Proportional to 688 and 917

Calculator

Solution

The third proportional to 688 and 917 is: 1,222.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    688 : 917 = 917 : x
  2. Step 2: Convert to fraction form
    688/917 = 917/x
  3. Step 3: Cross multiply
    688x = 917 × 917
  4. Step 4: Simplify right side
    688x = 840,889
  5. Step 5: Solve for x
    x = 840,889/688
  6. Step 6: Final answer
    x = 1,222.22

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.