Home / 637-781

Finding the Third Proportional to 637 and 781

Calculator

Solution

The third proportional to 637 and 781 is: 957.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    637 : 781 = 781 : x
  2. Step 2: Convert to fraction form
    637/781 = 781/x
  3. Step 3: Cross multiply
    637x = 781 × 781
  4. Step 4: Simplify right side
    637x = 609,961
  5. Step 5: Solve for x
    x = 609,961/637
  6. Step 6: Final answer
    x = 957.55

Related Problems

Find third proportional to 318.50 and 390.50
Half scale
Find third proportional to 1,274 and 1,562
Double scale
Find third proportional to 639 and 783
Similar ratio
Find third proportional to 955.50 and 1,171.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.