Home / 431,560,787.20-647,341,180.80-428,873,401.60

Finding the Fourth Proportional to 431,560,787.20, 647,341,180.80 and 428,873,401.60

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Solution

The fourth proportional to 431,560,787.20, 647,341,180.80 and 428,873,401.60 is: 643,310,102.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,560,787.20 : 647,341,180.80 = 428,873,401.60 : x
  2. Step 2: Convert to fraction form
    431,560,787.20/647,341,180.80 = 428,873,401.60/x
  3. Step 3: Cross multiply
    431,560,787.20x = 647,341,180.80 × 428,873,401.60
  4. Step 4: Simplify right side
    431,560,787.20x = 277,627,414,205,456,608
  5. Step 5: Solve for x
    x = 277,627,414,205,456,608/431,560,787.20
  6. Step 6: Final answer
    x = 643,310,102.40

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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.