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Finding the Fourth Proportional to 208,891.86, 288,121.86 and 191,719.68

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Solution

The fourth proportional to 208,891.86, 288,121.86 and 191,719.68 is: 264,436.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,891.86 : 288,121.86 = 191,719.68 : x
  2. Step 2: Convert to fraction form
    208,891.86/288,121.86 = 191,719.68/x
  3. Step 3: Cross multiply
    208,891.86x = 288,121.86 × 191,719.68
  4. Step 4: Simplify right side
    208,891.86x = 55,238,630,800.20
  5. Step 5: Solve for x
    x = 55,238,630,800.20/208,891.86
  6. Step 6: Final answer
    x = 264,436.49

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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.