Home / 623-840.50

Finding the Third Proportional to 623 and 840.50

Calculator

Solution

The third proportional to 623 and 840.50 is: 1,133.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    623 : 840.50 = 840.50 : x
  2. Step 2: Convert to fraction form
    623/840.50 = 840.50/x
  3. Step 3: Cross multiply
    623x = 840.50 × 840.50
  4. Step 4: Simplify right side
    623x = 706,440.25
  5. Step 5: Solve for x
    x = 706,440.25/623
  6. Step 6: Final answer
    x = 1,133.93

Related Problems

Find third proportional to 311.50 and 420.25
Half scale
Find third proportional to 1,246 and 1,681
Double scale
Find third proportional to 625 and 843
Similar ratio
Find third proportional to 934.50 and 1,260.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.