Home / 204.70-287.72

Finding the Third Proportional to 204.70 and 287.72

Calculator

Solution

The third proportional to 204.70 and 287.72 is: 404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.70 : 287.72 = 287.72 : x
  2. Step 2: Convert to fraction form
    204.70/287.72 = 287.72/x
  3. Step 3: Cross multiply
    204.70x = 287.72 × 287.72
  4. Step 4: Simplify right side
    204.70x = 82,782.08
  5. Step 5: Solve for x
    x = 82,782.08/204.70
  6. Step 6: Final answer
    x = 404.40

Related Problems

Find third proportional to 102.35 and 143.86
Half scale
Find third proportional to 409.41 and 575.44
Double scale
Find third proportional to 207 and 291
Similar ratio
Find third proportional to 307.05 and 431.58
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.