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Finding the Fourth Proportional to 499,986.92, 689,964.92 and 285,196.52

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Solution

The fourth proportional to 499,986.92, 689,964.92 and 285,196.52 is: 393,561.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,986.92 : 689,964.92 = 285,196.52 : x
  2. Step 2: Convert to fraction form
    499,986.92/689,964.92 = 285,196.52/x
  3. Step 3: Cross multiply
    499,986.92x = 689,964.92 × 285,196.52
  4. Step 4: Simplify right side
    499,986.92x = 196,775,594,106.08
  5. Step 5: Solve for x
    x = 196,775,594,106.08/499,986.92
  6. Step 6: Final answer
    x = 393,561.48

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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.