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Finding the Fourth Proportional to 738.45, 1,107.69 and 190.62

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Solution

The fourth proportional to 738.45, 1,107.69 and 190.62 is: 285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.45 : 1,107.69 = 190.62 : x
  2. Step 2: Convert to fraction form
    738.45/1,107.69 = 190.62/x
  3. Step 3: Cross multiply
    738.45x = 1,107.69 × 190.62
  4. Step 4: Simplify right side
    738.45x = 211,147.87
  5. Step 5: Solve for x
    x = 211,147.87/738.45
  6. Step 6: Final answer
    x = 285.93

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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.