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Finding the Fourth Proportional to 551,891.20, 826,087.20 and 394,427.20

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Solution

The fourth proportional to 551,891.20, 826,087.20 and 394,427.20 is: 590,390.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,891.20 : 826,087.20 = 394,427.20 : x
  2. Step 2: Convert to fraction form
    551,891.20/826,087.20 = 394,427.20/x
  3. Step 3: Cross multiply
    551,891.20x = 826,087.20 × 394,427.20
  4. Step 4: Simplify right side
    551,891.20x = 325,831,261,251.84
  5. Step 5: Solve for x
    x = 325,831,261,251.84/551,891.20
  6. Step 6: Final answer
    x = 590,390.39

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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.