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Finding the Fourth Proportional to 628.92, 944.28 and 385.92

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Solution

The fourth proportional to 628.92, 944.28 and 385.92 is: 579.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.92 : 944.28 = 385.92 : x
  2. Step 2: Convert to fraction form
    628.92/944.28 = 385.92/x
  3. Step 3: Cross multiply
    628.92x = 944.28 × 385.92
  4. Step 4: Simplify right side
    628.92x = 364,416.54
  5. Step 5: Solve for x
    x = 364,416.54/628.92
  6. Step 6: Final answer
    x = 579.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.