Home / 289,806-618,120

Finding the Third Proportional to 289,806 and 618,120

Calculator

Solution

The third proportional to 289,806 and 618,120 is: 1,318,372.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,806 : 618,120 = 618,120 : x
  2. Step 2: Convert to fraction form
    289,806/618,120 = 618,120/x
  3. Step 3: Cross multiply
    289,806x = 618,120 × 618,120
  4. Step 4: Simplify right side
    289,806x = 382,072,334,400
  5. Step 5: Solve for x
    x = 382,072,334,400/289,806
  6. Step 6: Final answer
    x = 1,318,372.75

Related Problems

Find third proportional to 144,903 and 309,060
Half scale
Find third proportional to 579,612 and 1,236,240
Double scale
Find third proportional to 289,808 and 618,124
Similar ratio
Find third proportional to 434,709 and 927,180
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.