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Finding the Fourth Proportional to 439.09, 606.05 and 283.57

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Solution

The fourth proportional to 439.09, 606.05 and 283.57 is: 391.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.09 : 606.05 = 283.57 : x
  2. Step 2: Convert to fraction form
    439.09/606.05 = 283.57/x
  3. Step 3: Cross multiply
    439.09x = 606.05 × 283.57
  4. Step 4: Simplify right side
    439.09x = 171,856.18
  5. Step 5: Solve for x
    x = 171,856.18/439.09
  6. Step 6: Final answer
    x = 391.39

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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.