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Finding the Fourth Proportional to 395.22, 590.48 and 300.79

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Solution

The fourth proportional to 395.22, 590.48 and 300.79 is: 449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.22 : 590.48 = 300.79 : x
  2. Step 2: Convert to fraction form
    395.22/590.48 = 300.79/x
  3. Step 3: Cross multiply
    395.22x = 590.48 × 300.79
  4. Step 4: Simplify right side
    395.22x = 177,610.48
  5. Step 5: Solve for x
    x = 177,610.48/395.22
  6. Step 6: Final answer
    x = 449.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.