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Finding the Fourth Proportional to 353,128.44, 487,326.86 and 191,994.33

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Solution

The fourth proportional to 353,128.44, 487,326.86 and 191,994.33 is: 264,957.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,128.44 : 487,326.86 = 191,994.33 : x
  2. Step 2: Convert to fraction form
    353,128.44/487,326.86 = 191,994.33/x
  3. Step 3: Cross multiply
    353,128.44x = 487,326.86 × 191,994.33
  4. Step 4: Simplify right side
    353,128.44x = 93,563,993,976.70
  5. Step 5: Solve for x
    x = 93,563,993,976.70/353,128.44
  6. Step 6: Final answer
    x = 264,957.40

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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.