Home / 374.75-643.50

Finding the Third Proportional to 374.75 and 643.50

Calculator

Solution

The third proportional to 374.75 and 643.50 is: 1,104.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.75 : 643.50 = 643.50 : x
  2. Step 2: Convert to fraction form
    374.75/643.50 = 643.50/x
  3. Step 3: Cross multiply
    374.75x = 643.50 × 643.50
  4. Step 4: Simplify right side
    374.75x = 414,092.25
  5. Step 5: Solve for x
    x = 414,092.25/374.75
  6. Step 6: Final answer
    x = 1,104.98

Related Problems

Find third proportional to 187.38 and 321.75
Half scale
Find third proportional to 749.50 and 1,287
Double scale
Find third proportional to 377 and 647
Similar ratio
Find third proportional to 562.13 and 965.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.