Home / 559.50-645

Finding the Third Proportional to 559.50 and 645

Calculator

Solution

The third proportional to 559.50 and 645 is: 743.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.50 : 645 = 645 : x
  2. Step 2: Convert to fraction form
    559.50/645 = 645/x
  3. Step 3: Cross multiply
    559.50x = 645 × 645
  4. Step 4: Simplify right side
    559.50x = 416,025
  5. Step 5: Solve for x
    x = 416,025/559.50
  6. Step 6: Final answer
    x = 743.57

Related Problems

Find third proportional to 279.75 and 322.50
Half scale
Find third proportional to 1,119 and 1,290
Double scale
Find third proportional to 562 and 647
Similar ratio
Find third proportional to 839.25 and 967.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.