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Finding the Fourth Proportional to 554.96, 831.36 and 408.44

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Solution

The fourth proportional to 554.96, 831.36 and 408.44 is: 611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.96 : 831.36 = 408.44 : x
  2. Step 2: Convert to fraction form
    554.96/831.36 = 408.44/x
  3. Step 3: Cross multiply
    554.96x = 831.36 × 408.44
  4. Step 4: Simplify right side
    554.96x = 339,560.68
  5. Step 5: Solve for x
    x = 339,560.68/554.96
  6. Step 6: Final answer
    x = 611.87

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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.