Home / 664.50-915

Finding the Third Proportional to 664.50 and 915

Calculator

Solution

The third proportional to 664.50 and 915 is: 1,259.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.50 : 915 = 915 : x
  2. Step 2: Convert to fraction form
    664.50/915 = 915/x
  3. Step 3: Cross multiply
    664.50x = 915 × 915
  4. Step 4: Simplify right side
    664.50x = 837,225
  5. Step 5: Solve for x
    x = 837,225/664.50
  6. Step 6: Final answer
    x = 1,259.93

Related Problems

Find third proportional to 332.25 and 457.50
Half scale
Find third proportional to 1,329 and 1,830
Double scale
Find third proportional to 667 and 918
Similar ratio
Find third proportional to 996.75 and 1,372.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.