Home / 805-1,218.50

Finding the Third Proportional to 805 and 1,218.50

Calculator

Solution

The third proportional to 805 and 1,218.50 is: 1,844.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805 : 1,218.50 = 1,218.50 : x
  2. Step 2: Convert to fraction form
    805/1,218.50 = 1,218.50/x
  3. Step 3: Cross multiply
    805x = 1,218.50 × 1,218.50
  4. Step 4: Simplify right side
    805x = 1,484,742.25
  5. Step 5: Solve for x
    x = 1,484,742.25/805
  6. Step 6: Final answer
    x = 1,844.40

Related Problems

Find third proportional to 402.50 and 609.25
Half scale
Find third proportional to 1,610 and 2,437
Double scale
Find third proportional to 807 and 1,222
Similar ratio
Find third proportional to 1,207.50 and 1,827.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.