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Finding the Fourth Proportional to 1,355.81, 2,033.72 and 329.81

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Solution

The fourth proportional to 1,355.81, 2,033.72 and 329.81 is: 494.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.81 : 2,033.72 = 329.81 : x
  2. Step 2: Convert to fraction form
    1,355.81/2,033.72 = 329.81/x
  3. Step 3: Cross multiply
    1,355.81x = 2,033.72 × 329.81
  4. Step 4: Simplify right side
    1,355.81x = 670,745.87
  5. Step 5: Solve for x
    x = 670,745.87/1,355.81
  6. Step 6: Final answer
    x = 494.72

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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.