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Finding the Fourth Proportional to 1,329.04, 1,993.12 and 404.48

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Solution

The fourth proportional to 1,329.04, 1,993.12 and 404.48 is: 606.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.04 : 1,993.12 = 404.48 : x
  2. Step 2: Convert to fraction form
    1,329.04/1,993.12 = 404.48/x
  3. Step 3: Cross multiply
    1,329.04x = 1,993.12 × 404.48
  4. Step 4: Simplify right side
    1,329.04x = 806,177.18
  5. Step 5: Solve for x
    x = 806,177.18/1,329.04
  6. Step 6: Final answer
    x = 606.59

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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.