Home / 507.75-661.50

Finding the Third Proportional to 507.75 and 661.50

Calculator

Solution

The third proportional to 507.75 and 661.50 is: 861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.75 : 661.50 = 661.50 : x
  2. Step 2: Convert to fraction form
    507.75/661.50 = 661.50/x
  3. Step 3: Cross multiply
    507.75x = 661.50 × 661.50
  4. Step 4: Simplify right side
    507.75x = 437,582.25
  5. Step 5: Solve for x
    x = 437,582.25/507.75
  6. Step 6: Final answer
    x = 861.81

Related Problems

Find third proportional to 253.88 and 330.75
Half scale
Find third proportional to 1,015.50 and 1,323
Double scale
Find third proportional to 510 and 664
Similar ratio
Find third proportional to 761.63 and 992.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.