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Finding the Fourth Proportional to 619.70, 929.69 and 186.86

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Solution

The fourth proportional to 619.70, 929.69 and 186.86 is: 280.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.70 : 929.69 = 186.86 : x
  2. Step 2: Convert to fraction form
    619.70/929.69 = 186.86/x
  3. Step 3: Cross multiply
    619.70x = 929.69 × 186.86
  4. Step 4: Simplify right side
    619.70x = 173,716.29
  5. Step 5: Solve for x
    x = 173,716.29/619.70
  6. Step 6: Final answer
    x = 280.33

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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.