Home / 281.50-478.75

Finding the Third Proportional to 281.50 and 478.75

Calculator

Solution

The third proportional to 281.50 and 478.75 is: 814.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.50 : 478.75 = 478.75 : x
  2. Step 2: Convert to fraction form
    281.50/478.75 = 478.75/x
  3. Step 3: Cross multiply
    281.50x = 478.75 × 478.75
  4. Step 4: Simplify right side
    281.50x = 229,201.56
  5. Step 5: Solve for x
    x = 229,201.56/281.50
  6. Step 6: Final answer
    x = 814.22

Related Problems

Find third proportional to 140.75 and 239.38
Half scale
Find third proportional to 563 and 957.50
Double scale
Find third proportional to 284 and 482
Similar ratio
Find third proportional to 422.25 and 718.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.