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Finding the Fourth Proportional to 1,332.73, 1,999.19 and 408.34

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Solution

The fourth proportional to 1,332.73, 1,999.19 and 408.34 is: 612.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.73 : 1,999.19 = 408.34 : x
  2. Step 2: Convert to fraction form
    1,332.73/1,999.19 = 408.34/x
  3. Step 3: Cross multiply
    1,332.73x = 1,999.19 × 408.34
  4. Step 4: Simplify right side
    1,332.73x = 816,349.24
  5. Step 5: Solve for x
    x = 816,349.24/1,332.73
  6. Step 6: Final answer
    x = 612.54

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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.