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Finding the Fourth Proportional to 689,915, 1,034,872.56 and 191,279

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Solution

The fourth proportional to 689,915, 1,034,872.56 and 191,279 is: 286,918.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,915 : 1,034,872.56 = 191,279 : x
  2. Step 2: Convert to fraction form
    689,915/1,034,872.56 = 191,279/x
  3. Step 3: Cross multiply
    689,915x = 1,034,872.56 × 191,279
  4. Step 4: Simplify right side
    689,915x = 197,949,388,404.24
  5. Step 5: Solve for x
    x = 197,949,388,404.24/689,915
  6. Step 6: Final answer
    x = 286,918.52

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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.