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Finding the Fourth Proportional to 439,120.28, 605,978.10 and 248,129.54

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Solution

The fourth proportional to 439,120.28, 605,978.10 and 248,129.54 is: 342,414.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,120.28 : 605,978.10 = 248,129.54 : x
  2. Step 2: Convert to fraction form
    439,120.28/605,978.10 = 248,129.54/x
  3. Step 3: Cross multiply
    439,120.28x = 605,978.10 × 248,129.54
  4. Step 4: Simplify right side
    439,120.28x = 150,361,067,203.07
  5. Step 5: Solve for x
    x = 150,361,067,203.07/439,120.28
  6. Step 6: Final answer
    x = 342,414.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.