Home / 757-847

Finding the Third Proportional to 757 and 847

Calculator

Solution

The third proportional to 757 and 847 is: 947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    757 : 847 = 847 : x
  2. Step 2: Convert to fraction form
    757/847 = 847/x
  3. Step 3: Cross multiply
    757x = 847 × 847
  4. Step 4: Simplify right side
    757x = 717,409
  5. Step 5: Solve for x
    x = 717,409/757
  6. Step 6: Final answer
    x = 947.70

Related Problems

Find third proportional to 378.50 and 423.50
Half scale
Find third proportional to 1,514 and 1,694
Double scale
Find third proportional to 759 and 849
Similar ratio
Find third proportional to 1,135.50 and 1,270.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.