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Finding the Fourth Proportional to 439.55, 606.09 and 359.55

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Solution

The fourth proportional to 439.55, 606.09 and 359.55 is: 495.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.55 : 606.09 = 359.55 : x
  2. Step 2: Convert to fraction form
    439.55/606.09 = 359.55/x
  3. Step 3: Cross multiply
    439.55x = 606.09 × 359.55
  4. Step 4: Simplify right side
    439.55x = 217,919.66
  5. Step 5: Solve for x
    x = 217,919.66/439.55
  6. Step 6: Final answer
    x = 495.78

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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.