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Finding the Fourth Proportional to 547,179.12, 821,028.60 and 378,958.32

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Solution

The fourth proportional to 547,179.12, 821,028.60 and 378,958.32 is: 568,617.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,179.12 : 821,028.60 = 378,958.32 : x
  2. Step 2: Convert to fraction form
    547,179.12/821,028.60 = 378,958.32/x
  3. Step 3: Cross multiply
    547,179.12x = 821,028.60 × 378,958.32
  4. Step 4: Simplify right side
    547,179.12x = 311,135,618,927.95
  5. Step 5: Solve for x
    x = 311,135,618,927.95/547,179.12
  6. Step 6: Final answer
    x = 568,617.49

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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.