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Finding the Fourth Proportional to 353,135.61, 487,324.71 and 191,990.65

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Solution

The fourth proportional to 353,135.61, 487,324.71 and 191,990.65 is: 264,945.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,135.61 : 487,324.71 = 191,990.65 : x
  2. Step 2: Convert to fraction form
    353,135.61/487,324.71 = 191,990.65/x
  3. Step 3: Cross multiply
    353,135.61x = 487,324.71 × 191,990.65
  4. Step 4: Simplify right side
    353,135.61x = 93,561,787,833.96
  5. Step 5: Solve for x
    x = 93,561,787,833.96/353,135.61
  6. Step 6: Final answer
    x = 264,945.77

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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.