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Finding the Fourth Proportional to 353,131.60, 487,319.21 and 191,986.65

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Solution

The fourth proportional to 353,131.60, 487,319.21 and 191,986.65 is: 264,940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,131.60 : 487,319.21 = 191,986.65 : x
  2. Step 2: Convert to fraction form
    353,131.60/487,319.21 = 191,986.65/x
  3. Step 3: Cross multiply
    353,131.60x = 487,319.21 × 191,986.65
  4. Step 4: Simplify right side
    353,131.60x = 93,558,780,728.00
  5. Step 5: Solve for x
    x = 93,558,780,728.00/353,131.60
  6. Step 6: Final answer
    x = 264,940.27

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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.