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Finding the Fourth Proportional to 738.55, 1,107.79 and 190.73

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Solution

The fourth proportional to 738.55, 1,107.79 and 190.73 is: 286.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.55 : 1,107.79 = 190.73 : x
  2. Step 2: Convert to fraction form
    738.55/1,107.79 = 190.73/x
  3. Step 3: Cross multiply
    738.55x = 1,107.79 × 190.73
  4. Step 4: Simplify right side
    738.55x = 211,288.79
  5. Step 5: Solve for x
    x = 211,288.79/738.55
  6. Step 6: Final answer
    x = 286.09

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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.