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Finding the Fourth Proportional to 353,218.86, 529,969.76 and 128,594.82

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Solution

The fourth proportional to 353,218.86, 529,969.76 and 128,594.82 is: 192,943.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,218.86 : 529,969.76 = 128,594.82 : x
  2. Step 2: Convert to fraction form
    353,218.86/529,969.76 = 128,594.82/x
  3. Step 3: Cross multiply
    353,218.86x = 529,969.76 × 128,594.82
  4. Step 4: Simplify right side
    353,218.86x = 68,151,365,249.67
  5. Step 5: Solve for x
    x = 68,151,365,249.67/353,218.86
  6. Step 6: Final answer
    x = 192,943.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.