Home / 285,279-398,808

Finding the Third Proportional to 285,279 and 398,808

Calculator

Solution

The third proportional to 285,279 and 398,808 is: 557,516.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,279 : 398,808 = 398,808 : x
  2. Step 2: Convert to fraction form
    285,279/398,808 = 398,808/x
  3. Step 3: Cross multiply
    285,279x = 398,808 × 398,808
  4. Step 4: Simplify right side
    285,279x = 159,047,820,864
  5. Step 5: Solve for x
    x = 159,047,820,864/285,279
  6. Step 6: Final answer
    x = 557,516.75

Related Problems

Find third proportional to 142,639.50 and 199,404
Half scale
Find third proportional to 570,558 and 797,616
Double scale
Find third proportional to 285,281 and 398,811
Similar ratio
Find third proportional to 427,918.50 and 598,212
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.