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Finding the Fourth Proportional to 251,930.70, 347,688.90 and 188,157.78

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Solution

The fourth proportional to 251,930.70, 347,688.90 and 188,157.78 is: 259,676.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,930.70 : 347,688.90 = 188,157.78 : x
  2. Step 2: Convert to fraction form
    251,930.70/347,688.90 = 188,157.78/x
  3. Step 3: Cross multiply
    251,930.70x = 347,688.90 × 188,157.78
  4. Step 4: Simplify right side
    251,930.70x = 65,420,371,554.64
  5. Step 5: Solve for x
    x = 65,420,371,554.64/251,930.70
  6. Step 6: Final answer
    x = 259,676.06

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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.