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Finding the Fourth Proportional to 439.10, 606.03 and 281.69

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Solution

The fourth proportional to 439.10, 606.03 and 281.69 is: 388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.10 : 606.03 = 281.69 : x
  2. Step 2: Convert to fraction form
    439.10/606.03 = 281.69/x
  3. Step 3: Cross multiply
    439.10x = 606.03 × 281.69
  4. Step 4: Simplify right side
    439.10x = 170,712.59
  5. Step 5: Solve for x
    x = 170,712.59/439.10
  6. Step 6: Final answer
    x = 388.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.