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Finding the Fourth Proportional to 1,329.41, 1,993.47 and 404.73

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Solution

The fourth proportional to 1,329.41, 1,993.47 and 404.73 is: 606.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.41 : 1,993.47 = 404.73 : x
  2. Step 2: Convert to fraction form
    1,329.41/1,993.47 = 404.73/x
  3. Step 3: Cross multiply
    1,329.41x = 1,993.47 × 404.73
  4. Step 4: Simplify right side
    1,329.41x = 806,817.11
  5. Step 5: Solve for x
    x = 806,817.11/1,329.41
  6. Step 6: Final answer
    x = 606.90

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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.