Home / 717-781

Finding the Third Proportional to 717 and 781

Calculator

Solution

The third proportional to 717 and 781 is: 850.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    717 : 781 = 781 : x
  2. Step 2: Convert to fraction form
    717/781 = 781/x
  3. Step 3: Cross multiply
    717x = 781 × 781
  4. Step 4: Simplify right side
    717x = 609,961
  5. Step 5: Solve for x
    x = 609,961/717
  6. Step 6: Final answer
    x = 850.71

Related Problems

Find third proportional to 358.50 and 390.50
Half scale
Find third proportional to 1,434 and 1,562
Double scale
Find third proportional to 719 and 783
Similar ratio
Find third proportional to 1,075.50 and 1,171.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.