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Finding the Fourth Proportional to 511,331.88, 705,627.54 and 278,760.36

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Solution

The fourth proportional to 511,331.88, 705,627.54 and 278,760.36 is: 384,683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,331.88 : 705,627.54 = 278,760.36 : x
  2. Step 2: Convert to fraction form
    511,331.88/705,627.54 = 278,760.36/x
  3. Step 3: Cross multiply
    511,331.88x = 705,627.54 × 278,760.36
  4. Step 4: Simplify right side
    511,331.88x = 196,700,987,076.31
  5. Step 5: Solve for x
    x = 196,700,987,076.31/511,331.88
  6. Step 6: Final answer
    x = 384,683.60

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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.