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Finding the Fourth Proportional to 518,979.45, 716,191.96 and 289,536.73

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Solution

The fourth proportional to 518,979.45, 716,191.96 and 289,536.73 is: 399,560.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,979.45 : 716,191.96 = 289,536.73 : x
  2. Step 2: Convert to fraction form
    518,979.45/716,191.96 = 289,536.73/x
  3. Step 3: Cross multiply
    518,979.45x = 716,191.96 × 289,536.73
  4. Step 4: Simplify right side
    518,979.45x = 207,363,877,400.73
  5. Step 5: Solve for x
    x = 207,363,877,400.73/518,979.45
  6. Step 6: Final answer
    x = 399,560.86

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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.