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Finding the Fourth Proportional to 439.50, 606.78 and 273.88

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Solution

The fourth proportional to 439.50, 606.78 and 273.88 is: 378.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.50 : 606.78 = 273.88 : x
  2. Step 2: Convert to fraction form
    439.50/606.78 = 273.88/x
  3. Step 3: Cross multiply
    439.50x = 606.78 × 273.88
  4. Step 4: Simplify right side
    439.50x = 166,184.91
  5. Step 5: Solve for x
    x = 166,184.91/439.50
  6. Step 6: Final answer
    x = 378.12

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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.