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Finding the Fourth Proportional to 439.34, 606.42 and 281.99

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Solution

The fourth proportional to 439.34, 606.42 and 281.99 is: 389.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.34 : 606.42 = 281.99 : x
  2. Step 2: Convert to fraction form
    439.34/606.42 = 281.99/x
  3. Step 3: Cross multiply
    439.34x = 606.42 × 281.99
  4. Step 4: Simplify right side
    439.34x = 171,005.89
  5. Step 5: Solve for x
    x = 171,005.89/439.34
  6. Step 6: Final answer
    x = 389.24

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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.