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Finding the Fourth Proportional to 439.69, 606.62 and 282.31

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Solution

The fourth proportional to 439.69, 606.62 and 282.31 is: 389.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.69 : 606.62 = 282.31 : x
  2. Step 2: Convert to fraction form
    439.69/606.62 = 282.31/x
  3. Step 3: Cross multiply
    439.69x = 606.62 × 282.31
  4. Step 4: Simplify right side
    439.69x = 171,252.49
  5. Step 5: Solve for x
    x = 171,252.49/439.69
  6. Step 6: Final answer
    x = 389.49

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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.