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Finding the Fourth Proportional to 446.78, 668.66 and 282.39

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Solution

The fourth proportional to 446.78, 668.66 and 282.39 is: 422.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.78 : 668.66 = 282.39 : x
  2. Step 2: Convert to fraction form
    446.78/668.66 = 282.39/x
  3. Step 3: Cross multiply
    446.78x = 668.66 × 282.39
  4. Step 4: Simplify right side
    446.78x = 188,818.98
  5. Step 5: Solve for x
    x = 188,818.98/446.78
  6. Step 6: Final answer
    x = 422.62

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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.