Home / 355,828-781,640

Finding the Third Proportional to 355,828 and 781,640

Calculator

Solution

The third proportional to 355,828 and 781,640 is: 1,717,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,828 : 781,640 = 781,640 : x
  2. Step 2: Convert to fraction form
    355,828/781,640 = 781,640/x
  3. Step 3: Cross multiply
    355,828x = 781,640 × 781,640
  4. Step 4: Simplify right side
    355,828x = 610,961,089,600
  5. Step 5: Solve for x
    x = 610,961,089,600/355,828
  6. Step 6: Final answer
    x = 1,717,012.40

Related Problems

Find third proportional to 177,914 and 390,820
Half scale
Find third proportional to 711,656 and 1,563,280
Double scale
Find third proportional to 355,830 and 781,644
Similar ratio
Find third proportional to 533,742 and 1,172,460
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.