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Finding the Fourth Proportional to 3,768.86, 5,653.83 and 1,172

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Solution

The fourth proportional to 3,768.86, 5,653.83 and 1,172 is: 1,758.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,768.86 : 5,653.83 = 1,172 : x
  2. Step 2: Convert to fraction form
    3,768.86/5,653.83 = 1,172/x
  3. Step 3: Cross multiply
    3,768.86x = 5,653.83 × 1,172
  4. Step 4: Simplify right side
    3,768.86x = 6,626,288.76
  5. Step 5: Solve for x
    x = 6,626,288.76/3,768.86
  6. Step 6: Final answer
    x = 1,758.17

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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.