Home / 1,271,435.20-1,906,180.80-640,801.60

Finding the Fourth Proportional to 1,271,435.20, 1,906,180.80 and 640,801.60

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Solution

The fourth proportional to 1,271,435.20, 1,906,180.80 and 640,801.60 is: 960,712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271,435.20 : 1,906,180.80 = 640,801.60 : x
  2. Step 2: Convert to fraction form
    1,271,435.20/1,906,180.80 = 640,801.60/x
  3. Step 3: Cross multiply
    1,271,435.20x = 1,906,180.80 × 640,801.60
  4. Step 4: Simplify right side
    1,271,435.20x = 1,221,483,706,529.28
  5. Step 5: Solve for x
    x = 1,221,483,706,529.28/1,271,435.20
  6. Step 6: Final answer
    x = 960,712.51

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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.