Home / 287.50-370.75

Finding the Third Proportional to 287.50 and 370.75

Calculator

Solution

The third proportional to 287.50 and 370.75 is: 478.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.50 : 370.75 = 370.75 : x
  2. Step 2: Convert to fraction form
    287.50/370.75 = 370.75/x
  3. Step 3: Cross multiply
    287.50x = 370.75 × 370.75
  4. Step 4: Simplify right side
    287.50x = 137,455.56
  5. Step 5: Solve for x
    x = 137,455.56/287.50
  6. Step 6: Final answer
    x = 478.11

Related Problems

Find third proportional to 143.75 and 185.38
Half scale
Find third proportional to 575 and 741.50
Double scale
Find third proportional to 290 and 373
Similar ratio
Find third proportional to 431.25 and 556.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.