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Finding the Fourth Proportional to 439.25, 606.56 and 340.83

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Solution

The fourth proportional to 439.25, 606.56 and 340.83 is: 470.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.25 : 606.56 = 340.83 : x
  2. Step 2: Convert to fraction form
    439.25/606.56 = 340.83/x
  3. Step 3: Cross multiply
    439.25x = 606.56 × 340.83
  4. Step 4: Simplify right side
    439.25x = 206,732.14
  5. Step 5: Solve for x
    x = 206,732.14/439.25
  6. Step 6: Final answer
    x = 470.65

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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.