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Finding the Fourth Proportional to 439.88, 606.58 and 395.69

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Solution

The fourth proportional to 439.88, 606.58 and 395.69 is: 545.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.88 : 606.58 = 395.69 : x
  2. Step 2: Convert to fraction form
    439.88/606.58 = 395.69/x
  3. Step 3: Cross multiply
    439.88x = 606.58 × 395.69
  4. Step 4: Simplify right side
    439.88x = 240,013.62
  5. Step 5: Solve for x
    x = 240,013.62/439.88
  6. Step 6: Final answer
    x = 545.64

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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.