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Finding the Fourth Proportional to 439.70, 606.90 and 282.44

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Solution

The fourth proportional to 439.70, 606.90 and 282.44 is: 389.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.70 : 606.90 = 282.44 : x
  2. Step 2: Convert to fraction form
    439.70/606.90 = 282.44/x
  3. Step 3: Cross multiply
    439.70x = 606.90 × 282.44
  4. Step 4: Simplify right side
    439.70x = 171,412.84
  5. Step 5: Solve for x
    x = 171,412.84/439.70
  6. Step 6: Final answer
    x = 389.84

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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.