Home / 555-1,286.25

Finding the Third Proportional to 555 and 1,286.25

Calculator

Solution

The third proportional to 555 and 1,286.25 is: 2,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    555 : 1,286.25 = 1,286.25 : x
  2. Step 2: Convert to fraction form
    555/1,286.25 = 1,286.25/x
  3. Step 3: Cross multiply
    555x = 1,286.25 × 1,286.25
  4. Step 4: Simplify right side
    555x = 1,654,439.06
  5. Step 5: Solve for x
    x = 1,654,439.06/555
  6. Step 6: Final answer
    x = 2,980.97

Related Problems

Find third proportional to 277.50 and 643.13
Half scale
Find third proportional to 1,110 and 2,572.50
Double scale
Find third proportional to 557 and 1,291
Similar ratio
Find third proportional to 832.50 and 1,929.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.