Home / 551.25-648

Finding the Third Proportional to 551.25 and 648

Calculator

Solution

The third proportional to 551.25 and 648 is: 761.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.25 : 648 = 648 : x
  2. Step 2: Convert to fraction form
    551.25/648 = 648/x
  3. Step 3: Cross multiply
    551.25x = 648 × 648
  4. Step 4: Simplify right side
    551.25x = 419,904
  5. Step 5: Solve for x
    x = 419,904/551.25
  6. Step 6: Final answer
    x = 761.73

Related Problems

Find third proportional to 275.63 and 324
Half scale
Find third proportional to 1,102.50 and 1,296
Double scale
Find third proportional to 553 and 650
Similar ratio
Find third proportional to 826.88 and 972
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.