Home / 611,280-916,920

Finding the Third Proportional to 611,280 and 916,920

Calculator

Solution

The third proportional to 611,280 and 916,920 is: 1,375,380

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,280 : 916,920 = 916,920 : x
  2. Step 2: Convert to fraction form
    611,280/916,920 = 916,920/x
  3. Step 3: Cross multiply
    611,280x = 916,920 × 916,920
  4. Step 4: Simplify right side
    611,280x = 840,742,286,400
  5. Step 5: Solve for x
    x = 840,742,286,400/611,280
  6. Step 6: Final answer
    x = 1,375,380

Related Problems

Find third proportional to 305,640 and 458,460
Half scale
Find third proportional to 1,222,560 and 1,833,840
Double scale
Find third proportional to 611,282 and 916,923
Similar ratio
Find third proportional to 916,920 and 1,375,380
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.