Home / 651.38-708.75

Finding the Third Proportional to 651.38 and 708.75

Calculator

Solution

The third proportional to 651.38 and 708.75 is: 771.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.38 : 708.75 = 708.75 : x
  2. Step 2: Convert to fraction form
    651.38/708.75 = 708.75/x
  3. Step 3: Cross multiply
    651.38x = 708.75 × 708.75
  4. Step 4: Simplify right side
    651.38x = 502,326.56
  5. Step 5: Solve for x
    x = 502,326.56/651.38
  6. Step 6: Final answer
    x = 771.18

Related Problems

Find third proportional to 325.69 and 354.38
Half scale
Find third proportional to 1,302.75 and 1,417.50
Double scale
Find third proportional to 653 and 711
Similar ratio
Find third proportional to 977.06 and 1,063.13
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.