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Finding the Fourth Proportional to 403.74, 604.44 and 281.79

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Solution

The fourth proportional to 403.74, 604.44 and 281.79 is: 421.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.74 : 604.44 = 281.79 : x
  2. Step 2: Convert to fraction form
    403.74/604.44 = 281.79/x
  3. Step 3: Cross multiply
    403.74x = 604.44 × 281.79
  4. Step 4: Simplify right side
    403.74x = 170,325.15
  5. Step 5: Solve for x
    x = 170,325.15/403.74
  6. Step 6: Final answer
    x = 421.87

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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.