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Finding the Fourth Proportional to 312,028, 430,423.68 and 191,227.84

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Solution

The fourth proportional to 312,028, 430,423.68 and 191,227.84 is: 263,787.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,028 : 430,423.68 = 191,227.84 : x
  2. Step 2: Convert to fraction form
    312,028/430,423.68 = 191,227.84/x
  3. Step 3: Cross multiply
    312,028x = 430,423.68 × 191,227.84
  4. Step 4: Simplify right side
    312,028x = 82,308,990,611.25
  5. Step 5: Solve for x
    x = 82,308,990,611.25/312,028
  6. Step 6: Final answer
    x = 263,787.19

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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.