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Finding the Fourth Proportional to 289,519, 399,653.46 and 187,631.92

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Solution

The fourth proportional to 289,519, 399,653.46 and 187,631.92 is: 259,008.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,519 : 399,653.46 = 187,631.92 : x
  2. Step 2: Convert to fraction form
    289,519/399,653.46 = 187,631.92/x
  3. Step 3: Cross multiply
    289,519x = 399,653.46 × 187,631.92
  4. Step 4: Simplify right side
    289,519x = 74,987,746,034.44
  5. Step 5: Solve for x
    x = 74,987,746,034.44/289,519
  6. Step 6: Final answer
    x = 259,008.03

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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.