Home / 218,743-312,802.50

Finding the Third Proportional to 218,743 and 312,802.50

Calculator

Solution

The third proportional to 218,743 and 312,802.50 is: 447,307.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,743 : 312,802.50 = 312,802.50 : x
  2. Step 2: Convert to fraction form
    218,743/312,802.50 = 312,802.50/x
  3. Step 3: Cross multiply
    218,743x = 312,802.50 × 312,802.50
  4. Step 4: Simplify right side
    218,743x = 97,845,404,006.25
  5. Step 5: Solve for x
    x = 97,845,404,006.25/218,743
  6. Step 6: Final answer
    x = 447,307.59

Related Problems

Find third proportional to 109,371.50 and 156,401.25
Half scale
Find third proportional to 437,486 and 625,605
Double scale
Find third proportional to 218,745 and 312,805
Similar ratio
Find third proportional to 328,114.50 and 469,203.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.